-82.57% is the change from 981 to 171
Calculation steps:
[( 171 - 981 ) ÷ 981] x 100 = -82.57%
Formula
Percentage change = [(171 - 981) / 981] x 100
Subtract the new number by the original number
171 - 981 = -810
-810 ÷ 981 = -0.8256880733944955
-0.8256880733944955 x 100 = -82.57%