-95.01% is the change from 621 to 31
Calculation steps:
[( 31 - 621 ) ÷ 621] x 100 = -95.01%
Formula
Percentage change = [(31 - 621) / 621] x 100
Subtract the new number by the original number
31 - 621 = -590
-590 ÷ 621 = -0.9500805152979066
-0.9500805152979066 x 100 = -95.01%