22.58% is the change from 31 to 38
Calculation steps:
[( 38 - 31 ) ÷ 31] x 100 = 22.58%
Formula
Percentage change = [(38 - 31) / 31] x 100
Subtract the new number by the original number
38 - 31 = 7
7 ÷ 31 = 0.22580645161290322
0.22580645161290322 x 100 = 22.58%