-83.44% is the change from 936 to 155
Calculation steps:
[( 155 - 936 ) ÷ 936] x 100 = -83.44%
Formula
Percentage change = [(155 - 936) / 936] x 100
Subtract the new number by the original number
155 - 936 = -781
-781 ÷ 936 = -0.8344017094017094
-0.8344017094017094 x 100 = -83.44%