28.69% is the change from 502 to 646
Calculation steps:
[( 646 - 502 ) ÷ 502] x 100 = 28.69%
Formula
Percentage change = [(646 - 502) / 502] x 100
Subtract the new number by the original number
646 - 502 = 144
144 ÷ 502 = 0.2868525896414343
0.2868525896414343 x 100 = 28.69%