-51.82% is the change from 137 to 66
Calculation steps:
[( 66 - 137 ) ÷ 137] x 100 = -51.82%
Formula
Percentage change = [(66 - 137) / 137] x 100
Subtract the new number by the original number
66 - 137 = -71
-71 ÷ 137 = -0.5182481751824818
-0.5182481751824818 x 100 = -51.82%