27.69% is the change from 502 to 641
Calculation steps:
[( 641 - 502 ) ÷ 502] x 100 = 27.69%
Formula
Percentage change = [(641 - 502) / 502] x 100
Subtract the new number by the original number
641 - 502 = 139
139 ÷ 502 = 0.27689243027888444
0.27689243027888444 x 100 = 27.69%