-82% is the change from 950 to 171
Calculation steps:
[( 171 - 950 ) ÷ 950] x 100 = -82%
Formula
Percentage change = [(171 - 950) / 950] x 100
Subtract the new number by the original number
171 - 950 = -779
-779 ÷ 950 = -0.82
-0.82 x 100 = -82%
Example