68.42% is the change from 38 to 64
Calculation steps:
[( 64 - 38 ) ÷ 38] x 100 = 68.42%
Formula
Percentage change = [(64 - 38) / 38] x 100
Subtract the new number by the original number
64 - 38 = 26
26 ÷ 38 = 0.6842105263157895
0.6842105263157895 x 100 = 68.42%