-73.75% is the change from 621 to 163
Calculation steps:
[( 163 - 621 ) ÷ 621] x 100 = -73.75%
Formula
Percentage change = [(163 - 621) / 621] x 100
Subtract the new number by the original number
163 - 621 = -458
-458 ÷ 621 = -0.7375201288244766
-0.7375201288244766 x 100 = -73.75%