151.37% is the change from 255 to 641
Calculation steps:
[( 641 - 255 ) ÷ 255] x 100 = 151.37%
Formula
Percentage change = [(641 - 255) / 255] x 100
Subtract the new number by the original number
641 - 255 = 386
386 ÷ 255 = 1.5137254901960784
1.5137254901960784 x 100 = 151.37%