-20.13% is the change from 621 to 496
Calculation steps:
[( 496 - 621 ) ÷ 621] x 100 = -20.13%
Formula
Percentage change = [(496 - 621) / 621] x 100
Subtract the new number by the original number
496 - 621 = -125
-125 ÷ 621 = -0.20128824476650564
-0.20128824476650564 x 100 = -20.13%