87.5% is the change from 24 to 45
Calculation steps:
[( 45 - 24 ) ÷ 24] x 100 = 87.5%
Formula
Percentage change = [(45 - 24) / 24] x 100
Subtract the new number by the original number
45 - 24 = 21
21 ÷ 24 = 0.875
0.875 x 100 = 87.5%
Example