112.5% is the change from 8 to 17
Calculation steps:
[( 17 - 8 ) ÷ 8] x 100 = 112.5%
Formula
Percentage change = [(17 - 8) / 8] x 100
Subtract the new number by the original number
17 - 8 = 9
9 ÷ 8 = 1.125
1.125 x 100 = 112.5%
Example