146.09% is the change from 256 to 630
Calculation steps:
[( 630 - 256 ) ÷ 256] x 100 = 146.09%
Formula
Percentage change = [(630 - 256) / 256] x 100
Subtract the new number by the original number
630 - 256 = 374
374 ÷ 256 = 1.4609375
1.4609375 x 100 = 146.09%