-88.85% is the change from 637 to 71
Calculation steps:
[( 71 - 637 ) ÷ 637] x 100 = -88.85%
Formula
Percentage change = [(71 - 637) / 637] x 100
Subtract the new number by the original number
71 - 637 = -566
-566 ÷ 637 = -0.8885400313971743
-0.8885400313971743 x 100 = -88.85%