-82.17% is the change from 959 to 171
Calculation steps:
[( 171 - 959 ) ÷ 959] x 100 = -82.17%
Formula
Percentage change = [(171 - 959) / 959] x 100
Subtract the new number by the original number
171 - 959 = -788
-788 ÷ 959 = -0.821689259645464
-0.821689259645464 x 100 = -82.17%