37.5% is the change from 8 to 11
Calculation steps:
[( 11 - 8 ) ÷ 8] x 100 = 37.5%
Formula
Percentage change = [(11 - 8) / 8] x 100
Subtract the new number by the original number
11 - 8 = 3
3 ÷ 8 = 0.375
0.375 x 100 = 37.5%
Example