carbon diff in hours and minutes code example

Example 1: carbon add minutes

Carbon::now()->addMinutes($minutes)->timestamp;

Example 2: change minutes in to hours carbon

You can use:
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$minutes = 1510;
$hours = intdiv($minutes, 60).':'. ($minutes % 60);
!!! This only works with php >= v7.xx

Previous answer:
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$minutes = 1510;
$hours = floor($minutes / 60).':'.($minutes - floor($minutes / 60) * 60);