37.5% is the change from 464 to 638
Calculation steps:
[( 638 - 464 ) ÷ 464] x 100 = 37.5%
Formula
Percentage change = [(638 - 464) / 464] x 100
Subtract the new number by the original number
638 - 464 = 174
174 ÷ 464 = 0.375
0.375 x 100 = 37.5%
Example