-42.22% is the change from 270 to 156
Calculation steps:
[( 156 - 270 ) ÷ 270] x 100 = -42.22%
Formula
Percentage change = [(156 - 270) / 270] x 100
Subtract the new number by the original number
156 - 270 = -114
-114 ÷ 270 = -0.4222222222222222
-0.4222222222222222 x 100 = -42.22%