19.72% is the change from 502 to 601
Calculation steps:
[( 601 - 502 ) ÷ 502] x 100 = 19.72%
Formula
Percentage change = [(601 - 502) / 502] x 100
Subtract the new number by the original number
601 - 502 = 99
99 ÷ 502 = 0.19721115537848605
0.19721115537848605 x 100 = 19.72%