138.28% is the change from 256 to 610
Calculation steps:
[( 610 - 256 ) ÷ 256] x 100 = 138.28%
Formula
Percentage change = [(610 - 256) / 256] x 100
Subtract the new number by the original number
610 - 256 = 354
354 ÷ 256 = 1.3828125
1.3828125 x 100 = 138.28%