-38.89% is the change from 108 to 66
Calculation steps:
[( 66 - 108 ) ÷ 108] x 100 = -38.89%
Formula
Percentage change = [(66 - 108) / 108] x 100
Subtract the new number by the original number
66 - 108 = -42
-42 ÷ 108 = -0.3888888888888889
-0.3888888888888889 x 100 = -38.89%