-81.68% is the change from 906 to 166
Calculation steps:
[( 166 - 906 ) ÷ 906] x 100 = -81.68%
Formula
Percentage change = [(166 - 906) / 906] x 100
Subtract the new number by the original number
166 - 906 = -740
-740 ÷ 906 = -0.8167770419426048
-0.8167770419426048 x 100 = -81.68%