12.07% is the change from 638 to 715
Calculation steps:
[( 715 - 638 ) ÷ 638] x 100 = 12.07%
Formula
Percentage change = [(715 - 638) / 638] x 100
Subtract the new number by the original number
715 - 638 = 77
77 ÷ 638 = 0.1206896551724138
0.1206896551724138 x 100 = 12.07%