79.28% is the change from 502 to 900
Calculation steps:
[( 900 - 502 ) ÷ 502] x 100 = 79.28%
Formula
Percentage change = [(900 - 502) / 502] x 100
Subtract the new number by the original number
900 - 502 = 398
398 ÷ 502 = 0.7928286852589641
0.7928286852589641 x 100 = 79.28%