13.58% is the change from 508 to 577
Calculation steps:
[( 577 - 508 ) ÷ 508] x 100 = 13.58%
Formula
Percentage change = [(577 - 508) / 508] x 100
Subtract the new number by the original number
577 - 508 = 69
69 ÷ 508 = 0.13582677165354332
0.13582677165354332 x 100 = 13.58%