31.58% is the change from 38 to 50
Calculation steps:
[( 50 - 38 ) ÷ 38] x 100 = 31.58%
Formula
Percentage change = [(50 - 38) / 38] x 100
Subtract the new number by the original number
50 - 38 = 12
12 ÷ 38 = 0.3157894736842105
0.3157894736842105 x 100 = 31.58%