-35% is the change from 240 to 156
Calculation steps:
[( 156 - 240 ) ÷ 240] x 100 = -35%
Formula
Percentage change = [(156 - 240) / 240] x 100
Subtract the new number by the original number
156 - 240 = -84
-84 ÷ 240 = -0.35
-0.35 x 100 = -35%
Example