-89.29% is the change from 663 to 71
Calculation steps:
[( 71 - 663 ) ÷ 663] x 100 = -89.29%
Formula
Percentage change = [(71 - 663) / 663] x 100
Subtract the new number by the original number
71 - 663 = -592
-592 ÷ 663 = -0.8929110105580694
-0.8929110105580694 x 100 = -89.29%