21.48% is the change from 540 to 656
Calculation steps:
[( 656 - 540 ) ÷ 540] x 100 = 21.48%
Formula
Percentage change = [(656 - 540) / 540] x 100
Subtract the new number by the original number
656 - 540 = 116
116 ÷ 540 = 0.21481481481481482
0.21481481481481482 x 100 = 21.48%