-91.03% is the change from 936 to 84
Calculation steps:
[( 84 - 936 ) ÷ 936] x 100 = -91.03%
Formula
Percentage change = [(84 - 936) / 936] x 100
Subtract the new number by the original number
84 - 936 = -852
-852 ÷ 936 = -0.9102564102564102
-0.9102564102564102 x 100 = -91.03%