151.97% is the change from 254 to 640
Calculation steps:
[( 640 - 254 ) ÷ 254] x 100 = 151.97%
Formula
Percentage change = [(640 - 254) / 254] x 100
Subtract the new number by the original number
640 - 254 = 386
386 ÷ 254 = 1.5196850393700787
1.5196850393700787 x 100 = 151.97%