151.95% is the change from 256 to 645
Calculation steps:
[( 645 - 256 ) ÷ 256] x 100 = 151.95%
Formula
Percentage change = [(645 - 256) / 256] x 100
Subtract the new number by the original number
645 - 256 = 389
389 ÷ 256 = 1.51953125
1.51953125 x 100 = 151.95%