15.38% is the change from 39 to 45
Calculation steps:
[( 45 - 39 ) ÷ 39] x 100 = 15.38%
Formula
Percentage change = [(45 - 39) / 39] x 100
Subtract the new number by the original number
45 - 39 = 6
6 ÷ 39 = 0.15384615384615385
0.15384615384615385 x 100 = 15.38%