-81.25% is the change from 240 to 45
Calculation steps:
[( 45 - 240 ) ÷ 240] x 100 = -81.25%
Formula
Percentage change = [(45 - 240) / 240] x 100
Subtract the new number by the original number
45 - 240 = -195
-195 ÷ 240 = -0.8125
-0.8125 x 100 = -81.25%