105.26% is the change from 19 to 39
Calculation steps:
[( 39 - 19 ) ÷ 19] x 100 = 105.26%
Formula
Percentage change = [(39 - 19) / 19] x 100
Subtract the new number by the original number
39 - 19 = 20
20 ÷ 19 = 1.0526315789473684
1.0526315789473684 x 100 = 105.26%