one decimal point means php code example
Example 1: fix to 2 decimal places php
return number_format((float)$number, 2, '.', '');
Example 2: round to 2 decimal places php
round(520.34345, 2); // 520.34
return number_format((float)$number, 2, '.', '');
round(520.34345, 2); // 520.34