-91.37% is the change from 997 to 86
Calculation steps:
[( 86 - 997 ) ÷ 997] x 100 = -91.37%
Formula
Percentage change = [(86 - 997) / 997] x 100
Subtract the new number by the original number
86 - 997 = -911
-911 ÷ 997 = -0.9137412236710131
-0.9137412236710131 x 100 = -91.37%