-52.86% is the change from 140 to 66
Calculation steps:
[( 66 - 140 ) ÷ 140] x 100 = -52.86%
Formula
Percentage change = [(66 - 140) / 140] x 100
Subtract the new number by the original number
66 - 140 = -74
-74 ÷ 140 = -0.5285714285714286
-0.5285714285714286 x 100 = -52.86%