-90.28% is the change from 936 to 91
Calculation steps:
[( 91 - 936 ) ÷ 936] x 100 = -90.28%
Formula
Percentage change = [(91 - 936) / 936] x 100
Subtract the new number by the original number
91 - 936 = -845
-845 ÷ 936 = -0.9027777777777778
-0.9027777777777778 x 100 = -90.28%