-82.1% is the change from 961 to 172
Calculation steps:
[( 172 - 961 ) ÷ 961] x 100 = -82.1%
Formula
Percentage change = [(172 - 961) / 961] x 100
Subtract the new number by the original number
172 - 961 = -789
-789 ÷ 961 = -0.8210197710718002
-0.8210197710718002 x 100 = -82.1%