-74.7% is the change from 656 to 166
Calculation steps:
[( 166 - 656 ) ÷ 656] x 100 = -74.7%
Formula
Percentage change = [(166 - 656) / 656] x 100
Subtract the new number by the original number
166 - 656 = -490
-490 ÷ 656 = -0.7469512195121951
-0.7469512195121951 x 100 = -74.7%