-35.42% is the change from 240 to 155
Calculation steps:
[( 155 - 240 ) ÷ 240] x 100 = -35.42%
Formula
Percentage change = [(155 - 240) / 240] x 100
Subtract the new number by the original number
155 - 240 = -85
-85 ÷ 240 = -0.3541666666666667
-0.3541666666666667 x 100 = -35.42%