It's Anagram Quine, not just Quine!
Unary, 100%
This is essentially the same as the Lenguage answer because of how the two are related. I think it's worth noting, though. I scored it as 100% because every permutation of the code will result in a quine of itself and I see that as X/X * 100 = 100%.
5.71728886e+3431 zeroes. The full number can be found in this snippet:
571,728,886,299,524,079,667,110,831,585,172,705,903,242,988,869,730,233,666,941,239,930,957,383,634,990,884,017,758,011,673,661,456,375,420,014,789,453,910,279,412,516,365,039,911,616,569,776,194,653,994,845,706,814,330,810,597,741,840,830,026,333,447,578,878,492,702,908,613,882,908,168,867,637,282,596,648,914,407,902,821,648,635,054,942,485,156,519,086,239,517,305,702,705,783,520,430,327,882,724,649,323,623,993,252,952,774,346,675,694,385,891,810,563,667,798,834,846,369,950,692,136,274,353,903,969,878,343,229,031,870,459,050,270,140,433,402,333,183,995,076,273,934,316,316,041,923,055,208,568,854,697,194,015,046,079,301,420,468,901,769,118,098,230,767,460,924,846,552,476,679,293,134,684,448,847,449,288,151,944,932,525,087,248,192,275,095,934,337,598,653,981,534,386,220,451,824,875,829,915,842,538,357,082,913,137,430,485,883,178,947,004,702,124,084,633,123,544,060,730,650,995,512,745,030,590,989,195,409,454,379,726,020,068,090,543,485,377,485,846,396,271,958,108,709,617,635,354,477,293,970,464,272,097,575,501,779,386,668,756,938,340,200,794,894,015,824,708,091,428,944,573,831,257,244,094,409,870,775,301,993,104,432,870,895,478,408,037,450,837,230,273,086,589,639,225,269,690,034,191,664,788,952,560,282,035,550,980,217,998,364,096,267,637,012,870,557,015,775,372,943,770,232,826,937,792,678,659,741,977,391,285,036,126,978,266,614,181,473,074,907,458,591,514,305,961,253,806,814,023,933,864,985,407,267,169,604,856,107,931,116,888,268,748,039,451,683,353,551,414,447,462,928,850,923,445,503,652,021,793,168,648,510,513,597,305,336,955,173,718,471,931,736,313,986,020,652,567,023,366,257,316,037,210,037,318,158,858,503,724,736,280,981,391,398,280,363,850,853,361,932,459,586,164,155,418,666,917,331,478,035,204,211,067,642,357,524,068,995,687,396,230,593,421,768,310,516,964,395,591,974,018,305,173,396,770,508,740,001,527,520,092,344,197,005,623,355,537,596,657,473,766,544,801,370,212,627,256,410,732,664,011,822,421,191,103,127,619,073,582,845,123,484,719,578,718,376,300,070,162,355,969,718,786,766,544,705,666,866,547,241,576,008,751,585,319,953,584,072,266,931,915,765,118,041,170,749,844,694,686,800,072,822,536,450,477,293,767,227,280,278,303,598,479,313,816,303,539,184,630,996,668,979,230,004,925,749,414,158,627,159,671,600,379,023,203,894,575,932,729,998,748,035,419,783,450,180,418,397,923,824,642,227,478,374,530,825,875,117,414,862,969,170,359,605,774,864,660,165,183,532,258,493,867,754,625,154,388,052,741,695,648,070,594,472,531,159,793,952,847,078,816,841,601,345,611,759,202,959,380,748,999,978,577,549,942,317,774,738,570,775,404,426,481,919,733,186,968,468,431,270,431,605,972,498,637,946,956,126,022,229,614,797,087,117,225,823,565,342,748,501,153,741,450,722,494,697,466,495,557,622,414,355,168,111,360,033,562,039,346,636,733,121,121,610,857,454,876,606,487,443,794,811,222,591,756,267,144,914,006,412,918,432,311,781,300,777,103,610,374,114,091,997,695,742,108,877,002,082,862,282,098,075,681,749,979,978,446,425,489,037,395,541,763,956,873,201,738,020,809,689,085,082,333,652,677,837,122,632,903,083,224,964,125,736,624,491,672,540,404,024,051,399,430,701,347,505,739,704,581,760,444,853,708,889,328,730,053,965,944,499,104,791,856,210,999,740,898,398,825,918,657,619,888,095,865,548,102,735,913,913,094,386,735,714,696,418,726,741,576,678,447,905,375,266,819,534,780,270,705,492,733,528,843,064,273,668,310,355,948,806,085,914,998,909,078,430,123,434,842,644,353,766,593,108,209,757,731,578,915,664,389,676,321,477,765,937,156,616,387,196,395,610,946,243,206,146,663,560,610,797,140,874,906,254,178,018,061,181,083,047,209,661,789,909,286,724,851,898,477,573,800,702,633,601,175,620,396,600,949,134,122,178,276,685,812,142,120,568,127,180,096,273,903,971,758,009,993,201,718,908,993,673,764,199,386,800,398,143,178,502,530,082,660,500,014,722,964,981,864,977,851,706,298,981,882,062,478,994,083,243,364,559,882,663,594,491,418,634,537,443,259,947,411,981,605,363,306,172,530,522,346,606,185,828,881,879,282,631,498,937,150,281,652,951,729,913,616,393,089,658,674,346,663,853,707,461,126,940,124,422,764,766,614,384,500,640,200,165,833,857,590,144,741,546,981,402,879,612,572,412,230,319,659,934,882,344,598,744,566,237,876,680,653,747,327,784,600,034,796,624,136,727,679,072,247,471,775,907,417,517,609,655,422,229,860,544,695,004,718,249,668,190,489,544,232,936,202,367,307,609,329,582,839,156,431,588,444,789,676,252,562,273,585,535,627,566,417,124,298,941,319,814,273,113,830,010,077,536,882,402,273,792,934,052,604,658,425,046,299,684,558,311,449,368,519,016,440,435,219,777,519,127,752,414,574,327,366,464,226,160,312,027,143
The Brainf*ck equivalent is in this snippet:
>+++++>++>++++++>+>+++++>+++++>+>++++++>+>+++++>+>++++++>+>+++++>+>++++++>+++>+++++>+++++>+>+++>++>+
+++>++++++>++>++++++>+++>+++++>++>++++++>++>+++++>++>++++++>+>+++++>+++++>+>++++++>+>+++++>+>++++++>
+>+++++>+>++++++>++>+++>+++++>+++++>+>+++>++>++++>++++++>++>++++++>+++>+++>+++>+++++>++>++++++>++>++
+++>++>++++++>+>++++>++++++>+>++++++>+>+++++>+>++++++>+>+++++>++++>+++++>++>+++>+>++++>++++++>+>++++
++>++>++>+++++>++>++++++>+>+++++>+++++>+++++>+>++++++>+>+++>++>++>+++++>++>++++++>+>++++>++++++>+>++
+++>+>++++++>+++>+>++++>+++++>++++>+++++>++++>+++++>++++>+++++>++++>+++++>++++>+++++>++++>++>++++>+>
+>+>+++++>+>+>+>++++++>+++>+++>+>+>+>+++>+>+>+>+++>+++++>++>++>++>++++++>+>++++++>++>+++++>++++>+>+>
+>+++++>+>+>+>++++++>+++>+++>+>+>+>+++>+++>+>+>+>+++>+++>+++++>++>++>++>++++++>++++++>+>++++++>++>++
+++>++++>+>+>+>+++++>+>+>+>++++++>+++>+++>+>+>+>+++>+++>+>+>+>+++>+++++>++>++>++>++++++>++++++>+>+++
+++>++>+++++>++++>+>+>+>+++++>+>+>+>++++++>+++>+>+>+>+++>+++>+>+>+>+++>+++>+++++>++>++>++>++++++>+++
+++>+>++++++>++>+++++>++++>+>+>+>+++++>+>+>+>++++++>+++>+>+>+>+++>+++>+>+>+>+++>+++++>++>++>++>+++++
+>++++++>+>++++++>++>+++++>++++>+>+>+>+++++>+>+>+>++++++>+++>+>+>+>+++>+>+>+>+++>+++>+++++>++>++>++>
++++++>++++++>+>++++++>++>+++++>++++>+>+>+>+++++>+>+>+>++++++>+++>+>+>+>+++>+>+>+>+++>+++++>++>++>++
>++++++>++++++>++>+++++>++>++++++>+>++++++>+++>+++>++>+++>+++++>++>+++>+>+>+++++>+++++>+>+++>+>+++>+
+>++>++++>++++++>+>+++++>++>+++>+>++++>++++++>+>++++>+++++>++++>+++++>++++>+>+++++>+>+++>+>+++>++>++
>++++>++++++>+>+++++>++>+++>+>++++>++++++>+>+++++>++>+++>+>++++>+++++>++>++++>+>+++++>++++>++++++>++
++++>++++++>++>+++++>++++>++>++++>+>+>+>+++++>+>+>+>++++++>++>++>++>+++++>+++++>+>+>+>+++>++>++>++>+
+++>++++++>++>++>++>++++++>+>+>+>+++>+++>+++>++>++>++>+++>+++>+++>++>++>++>++++>++++>++++>++>++>++>+
++++>++>++>++>++++++>+>++++>+>+>+++++>+>+>+>++++++>+++>+++++>+>+>+>++++++>+>++++++>++>++>++++++>++++
++>+>++++++>++>++>++>+++++>++>++>++>++++++>+>+++++>++>++>+++>+>+++>+>++++>++++++>++>++>+++++>+>+>+++
>++>++>++++>++++++>+>+++++>++++>+>+>+>+++++>+++++>+>+++>+>+++>++>++>++++>++++++>+>+++++>++>+++>+>+++
+>++++++>+>++++>+++++>++>+++>+>++++>+++++>++>++++>+>++++>++++++>++>+++++>++++>++>++++>++++>+>+>+>+++
++>+>+>+>++++++>++>++>++>+++++>+++++>+>+>+>+++>++>++>++>++++>++++++>++>++>++>++++++>+>+>+>+++>+++>++
+>++>++>++>++>++>++>+++++>++>++>++>++++++>+>++++>+>+>+++++>+>+>+>++++++>+++>+++++>+>+>+>++++++>++>++
>++++++>+>++++++>+>++++++>++>++>++>+++++>++>++>++>++++++>++++++>+>+++++>++>++>+++>+>+++>+>++++>+++++
+>++>++>+++++>+>+>+++>++>++>++++>++++++>+>+++++>++++>+>+>+>+++++>+++++>+>+++>+>+++>++>++>++++>++++++
>+>+++++>++>+++>+>++++>++++++>+++>+>++++>+++++>++>++++>+>+++++>++++>++++++>++++++>++>+++++>++++>++>+
+++>++>++>++>+++++>++>++>++>++++++>+>++++>+>+>+++++>+>+>+>++++++>+>+>+>+++++>+++++>++>++>++>+++>+>+>
+>++++>++++++>+>+>+>++++++>++>++>++>++>++>++++++>+>+>++++++>++>++>++>+++++>++>++>++>++++++>++++++>+>
+++++>+>++++>++>++++>++++++>+>++++++>+>+++++>+++>+++>+++>+++++>+>+++>+++>+++>+++>+++>+++>+++>+++>++>
++++>++++++>+>+++++++>+>+>++++++[<]>[[>]>[>]>[>]+[[>+<-]<]+[<]<[<]>[[>]>[>]>[>]<+[[>+<-]<]+++[<]<[<]
>-]>]>[>]>[-[<+>-]>]<<[<]>[[[>]>+<<[<]>-]>[>]+>-[-[-[-[-[-[-<->>>[>>>]++>>>+>>>+[<<<]>]<[->>>[>>>]++
>>>++>>>++[<<<]]>]<[->>>[>>>]++>>>++>>>+[<<<]]>]<[->>>[>>>]+>>>++>>>++[<<<]]>]<[->>>[>>>]+>>>++>>>+[
<<<]]>]<[->>>[>>>]+>>>+>>>++[<<<]]>]<[->>>[>>>]+>>>+>>>+[<<<]]<[<]>]++
%
<+[<+>>[[>+>+<<-]>[<+>-]>-[-[->[>+>+<<-]>[<+>-]>[<+>-[<->[-]]]<[-<->>>[>>>]<<<[[>>>+<<<-]<<<]>>>+++<
<<+++<<<---<<<[<<<]>->>[>>>]+[>>>]>]<<]]>]<<<[<<<]>[<<+>+>-]<<[>>+<<-]>[->>>[[>+>+<<-]>[<+>-]>-[<+>-
[<->-]<[-<-->>>[>>>]<<<[[>>>+<<<-]<<<]>>>+++<<<<<<[<<<]>->>[>>>]+[>>>]<<]>]>]<<<[<<<]]>[<<+>+>-]<<[>
>+<<-]>[->>>[[>+>+<<-]>[<+>-]+>-[<->[-]]<[-<-<<<[<<<]>->>[>>>]>>>[[<<<+>>>-]>>>]<<<<<]>>]<<<[<<<]]>[
>-<-]>]>[+++[>++++++++<-]>.>>]
Source of source
Lenguage, 100%
5.71728886e+3431 null bytes. The full number can be found in this snippet:
571728886299524079667110831585172705903242988869730233666941239930957383634990884017758011673661456375420014789453910279412516365039911616569776194653994845706814330810597741840830026333447578878492702908613882908168867637282596648914407902821648635054942485156519086239517305702705783520430327882724649323623993252952774346675694385891810563667798834846369950692136274353903969878343229031870459050270140433402333183995076273934316316041923055208568854697194015046079301420468901769118098230767460924846552476679293134684448847449288151944932525087248192275095934337598653981534386220451824875829915842538357082913137430485883178947004702124084633123544060730650995512745030590989195409454379726020068090543485377485846396271958108709617635354477293970464272097575501779386668756938340200794894015824708091428944573831257244094409870775301993104432870895478408037450837230273086589639225269690034191664788952560282035550980217998364096267637012870557015775372943770232826937792678659741977391285036126978266614181473074907458591514305961253806814023933864985407267169604856107931116888268748039451683353551414447462928850923445503652021793168648510513597305336955173718471931736313986020652567023366257316037210037318158858503724736280981391398280363850853361932459586164155418666917331478035204211067642357524068995687396230593421768310516964395591974018305173396770508740001527520092344197005623355537596657473766544801370212627256410732664011822421191103127619073582845123484719578718376300070162355969718786766544705666866547241576008751585319953584072266931915765118041170749844694686800072822536450477293767227280278303598479313816303539184630996668979230004925749414158627159671600379023203894575932729998748035419783450180418397923824642227478374530825875117414862969170359605774864660165183532258493867754625154388052741695648070594472531159793952847078816841601345611759202959380748999978577549942317774738570775404426481919733186968468431270431605972498637946956126022229614797087117225823565342748501153741450722494697466495557622414355168111360033562039346636733121121610857454876606487443794811222591756267144914006412918432311781300777103610374114091997695742108877002082862282098075681749979978446425489037395541763956873201738020809689085082333652677837122632903083224964125736624491672540404024051399430701347505739704581760444853708889328730053965944499104791856210999740898398825918657619888095865548102735913913094386735714696418726741576678447905375266819534780270705492733528843064273668310355948806085914998909078430123434842644353766593108209757731578915664389676321477765937156616387196395610946243206146663560610797140874906254178018061181083047209661789909286724851898477573800702633601175620396600949134122178276685812142120568127180096273903971758009993201718908993673764199386800398143178502530082660500014722964981864977851706298981882062478994083243364559882663594491418634537443259947411981605363306172530522346606185828881879282631498937150281652951729913616393089658674346663853707461126940124422764766614384500640200165833857590144741546981402879612572412230319659934882344598744566237876680653747327784600034796624136727679072247471775907417517609655422229860544695004718249668190489544232936202367307609329582839156431588444789676252562273585535627566417124298941319814273113830010077536882402273792934052604658425046299684558311449368519016440435219777519127752414574327366464226160312027143
Jelly, 33.333...%
”ṘṘ
Try it online!
Community wiki because I did not write this. If you like this solution, or want an explanation, see Dennis's original post here.