-91.03% is the change from 959 to 86
Calculation steps:
[( 86 - 959 ) ÷ 959] x 100 = -91.03%
Formula
Percentage change = [(86 - 959) / 959] x 100
Subtract the new number by the original number
86 - 959 = -873
-873 ÷ 959 = -0.9103232533889468
-0.9103232533889468 x 100 = -91.03%