-81.58% is the change from 934 to 172
Calculation steps:
[( 172 - 934 ) ÷ 934] x 100 = -81.58%
Formula
Percentage change = [(172 - 934) / 934] x 100
Subtract the new number by the original number
172 - 934 = -762
-762 ÷ 934 = -0.815845824411135
-0.815845824411135 x 100 = -81.58%