79.32% is the change from 503 to 902
Calculation steps:
[( 902 - 503 ) ÷ 503] x 100 = 79.32%
Formula
Percentage change = [(902 - 503) / 503] x 100
Subtract the new number by the original number
902 - 503 = 399
399 ÷ 503 = 0.7932405566600398
0.7932405566600398 x 100 = 79.32%