-81.57% is the change from 928 to 171
Calculation steps:
[( 171 - 928 ) ÷ 928] x 100 = -81.57%
Formula
Percentage change = [(171 - 928) / 928] x 100
Subtract the new number by the original number
171 - 928 = -757
-757 ÷ 928 = -0.8157327586206896
-0.8157327586206896 x 100 = -81.57%