-91.13% is the change from 970 to 86
Calculation steps:
[( 86 - 970 ) ÷ 970] x 100 = -91.13%
Formula
Percentage change = [(86 - 970) / 970] x 100
Subtract the new number by the original number
86 - 970 = -884
-884 ÷ 970 = -0.911340206185567
-0.911340206185567 x 100 = -91.13%