-90.58% is the change from 913 to 86
Calculation steps:
[( 86 - 913 ) ÷ 913] x 100 = -90.58%
Formula
Percentage change = [(86 - 913) / 913] x 100
Subtract the new number by the original number
86 - 913 = -827
-827 ÷ 913 = -0.9058050383351588
-0.9058050383351588 x 100 = -90.58%