900% is the change from 24 to 240
Calculation steps:
[( 240 - 24 ) ÷ 24] x 100 = 900%
Formula
Percentage change = [(240 - 24) / 24] x 100
Subtract the new number by the original number
240 - 24 = 216
216 ÷ 24 = 9
9 x 100 = 900%
Example