137.89% is the change from 256 to 609
Calculation steps:
[( 609 - 256 ) ÷ 256] x 100 = 137.89%
Formula
Percentage change = [(609 - 256) / 256] x 100
Subtract the new number by the original number
609 - 256 = 353
353 ÷ 256 = 1.37890625
1.37890625 x 100 = 137.89%