18.34% is the change from 638 to 755
Calculation steps:
[( 755 - 638 ) ÷ 638] x 100 = 18.34%
Formula
Percentage change = [(755 - 638) / 638] x 100
Subtract the new number by the original number
755 - 638 = 117
117 ÷ 638 = 0.1833855799373041
0.1833855799373041 x 100 = 18.34%