-90.92% is the change from 936 to 85
Calculation steps:
[( 85 - 936 ) ÷ 936] x 100 = -90.92%
Formula
Percentage change = [(85 - 936) / 936] x 100
Subtract the new number by the original number
85 - 936 = -851
-851 ÷ 936 = -0.9091880341880342
-0.9091880341880342 x 100 = -90.92%