-96.25% is the change from 240 to 9
Calculation steps:
[( 9 - 240 ) ÷ 240] x 100 = -96.25%
Formula
Percentage change = [(9 - 240) / 240] x 100
Subtract the new number by the original number
9 - 240 = -231
-231 ÷ 240 = -0.9625
-0.9625 x 100 = -96.25%
Example