-81.13% is the change from 906 to 171
Calculation steps:
[( 171 - 906 ) ÷ 906] x 100 = -81.13%
Formula
Percentage change = [(171 - 906) / 906] x 100
Subtract the new number by the original number
171 - 906 = -735
-735 ÷ 906 = -0.8112582781456954
-0.8112582781456954 x 100 = -81.13%