135.55% is the change from 256 to 603
Calculation steps:
[( 603 - 256 ) ÷ 256] x 100 = 135.55%
Formula
Percentage change = [(603 - 256) / 256] x 100
Subtract the new number by the original number
603 - 256 = 347
347 ÷ 256 = 1.35546875
1.35546875 x 100 = 135.55%