-5.34% is the change from 656 to 621
Calculation steps:
[( 621 - 656 ) ÷ 656] x 100 = -5.34%
Formula
Percentage change = [(621 - 656) / 656] x 100
Subtract the new number by the original number
621 - 656 = -35
-35 ÷ 656 = -0.053353658536585365
-0.053353658536585365 x 100 = -5.34%