-57.69% is the change from 156 to 66
Calculation steps:
[( 66 - 156 ) ÷ 156] x 100 = -57.69%
Formula
Percentage change = [(66 - 156) / 156] x 100
Subtract the new number by the original number
66 - 156 = -90
-90 ÷ 156 = -0.5769230769230769
-0.5769230769230769 x 100 = -57.69%