-91.47% is the change from 621 to 53
Calculation steps:
[( 53 - 621 ) ÷ 621] x 100 = -91.47%
Formula
Percentage change = [(53 - 621) / 621] x 100
Subtract the new number by the original number
53 - 621 = -568
-568 ÷ 621 = -0.9146537842190016
-0.9146537842190016 x 100 = -91.47%