-95.32% is the change from 663 to 31
Calculation steps:
[( 31 - 663 ) ÷ 663] x 100 = -95.32%
Formula
Percentage change = [(31 - 663) / 663] x 100
Subtract the new number by the original number
31 - 663 = -632
-632 ÷ 663 = -0.9532428355957768
-0.9532428355957768 x 100 = -95.32%