-88.57% is the change from 621 to 71
Calculation steps:
[( 71 - 621 ) ÷ 621] x 100 = -88.57%
Formula
Percentage change = [(71 - 621) / 621] x 100
Subtract the new number by the original number
71 - 621 = -550
-550 ÷ 621 = -0.8856682769726248
-0.8856682769726248 x 100 = -88.57%