148.25% is the change from 257 to 638
Calculation steps:
[( 638 - 257 ) ÷ 257] x 100 = 148.25%
Formula
Percentage change = [(638 - 257) / 257] x 100
Subtract the new number by the original number
638 - 257 = 381
381 ÷ 257 = 1.482490272373541
1.482490272373541 x 100 = 148.25%