77.76% is the change from 508 to 903
Calculation steps:
[( 903 - 508 ) ÷ 508] x 100 = 77.76%
Formula
Percentage change = [(903 - 508) / 508] x 100
Subtract the new number by the original number
903 - 508 = 395
395 ÷ 508 = 0.7775590551181102
0.7775590551181102 x 100 = 77.76%