-74.46% is the change from 650 to 166
Calculation steps:
[( 166 - 650 ) ÷ 650] x 100 = -74.46%
Formula
Percentage change = [(166 - 650) / 650] x 100
Subtract the new number by the original number
166 - 650 = -484
-484 ÷ 650 = -0.7446153846153846
-0.7446153846153846 x 100 = -74.46%