-81.73% is the change from 936 to 171
Calculation steps:
[( 171 - 936 ) ÷ 936] x 100 = -81.73%
Formula
Percentage change = [(171 - 936) / 936] x 100
Subtract the new number by the original number
171 - 936 = -765
-765 ÷ 936 = -0.8173076923076923
-0.8173076923076923 x 100 = -81.73%