-81.49% is the change from 929 to 172
Calculation steps:
[( 172 - 929 ) ÷ 929] x 100 = -81.49%
Formula
Percentage change = [(172 - 929) / 929] x 100
Subtract the new number by the original number
172 - 929 = -757
-757 ÷ 929 = -0.8148546824542519
-0.8148546824542519 x 100 = -81.49%