77.56% is the change from 508 to 902
Calculation steps:
[( 902 - 508 ) ÷ 508] x 100 = 77.56%
Formula
Percentage change = [(902 - 508) / 508] x 100
Subtract the new number by the original number
902 - 508 = 394
394 ÷ 508 = 0.7755905511811023
0.7755905511811023 x 100 = 77.56%