25.91% is the change from 521 to 656
Calculation steps:
[( 656 - 521 ) ÷ 521] x 100 = 25.91%
Formula
Percentage change = [(656 - 521) / 521] x 100
Subtract the new number by the original number
656 - 521 = 135
135 ÷ 521 = 0.2591170825335892
0.2591170825335892 x 100 = 25.91%