-91.01% is the change from 957 to 86
Calculation steps:
[( 86 - 957 ) ÷ 957] x 100 = -91.01%
Formula
Percentage change = [(86 - 957) / 957] x 100
Subtract the new number by the original number
86 - 957 = -871
-871 ÷ 957 = -0.910135841170324
-0.910135841170324 x 100 = -91.01%