172.65% is the change from 234 to 638
Calculation steps:
[( 638 - 234 ) ÷ 234] x 100 = 172.65%
Formula
Percentage change = [(638 - 234) / 234] x 100
Subtract the new number by the original number
638 - 234 = 404
404 ÷ 234 = 1.7264957264957266
1.7264957264957266 x 100 = 172.65%