25% is the change from 656 to 820
Calculation steps:
[( 820 - 656 ) ÷ 656] x 100 = 25%
Formula
Percentage change = [(820 - 656) / 656] x 100
Subtract the new number by the original number
820 - 656 = 164
164 ÷ 656 = 0.25
0.25 x 100 = 25%
Example