-81.7% is the change from 907 to 166
Calculation steps:
[( 166 - 907 ) ÷ 907] x 100 = -81.7%
Formula
Percentage change = [(166 - 907) / 907] x 100
Subtract the new number by the original number
166 - 907 = -741
-741 ÷ 907 = -0.8169790518191842
-0.8169790518191842 x 100 = -81.7%