-88.92% is the change from 641 to 71
Calculation steps:
[( 71 - 641 ) ÷ 641] x 100 = -88.92%
Formula
Percentage change = [(71 - 641) / 641] x 100
Subtract the new number by the original number
71 - 641 = -570
-570 ÷ 641 = -0.8892355694227769
-0.8892355694227769 x 100 = -88.92%