20.96% is the change from 477 to 577
Calculation steps:
[( 577 - 477 ) ÷ 477] x 100 = 20.96%
Formula
Percentage change = [(577 - 477) / 477] x 100
Subtract the new number by the original number
577 - 477 = 100
100 ÷ 477 = 0.20964360587002095
0.20964360587002095 x 100 = 20.96%