79.68% is the change from 502 to 902
Calculation steps:
[( 902 - 502 ) ÷ 502] x 100 = 79.68%
Formula
Percentage change = [(902 - 502) / 502] x 100
Subtract the new number by the original number
902 - 502 = 400
400 ÷ 502 = 0.796812749003984
0.796812749003984 x 100 = 79.68%