149.81% is the change from 257 to 642
Calculation steps:
[( 642 - 257 ) ÷ 257] x 100 = 149.81%
Formula
Percentage change = [(642 - 257) / 257] x 100
Subtract the new number by the original number
642 - 257 = 385
385 ÷ 257 = 1.4980544747081712
1.4980544747081712 x 100 = 149.81%