315.58% is the change from 154 to 640
Calculation steps:
[( 640 - 154 ) ÷ 154] x 100 = 315.58%
Formula
Percentage change = [(640 - 154) / 154] x 100
Subtract the new number by the original number
640 - 154 = 486
486 ÷ 154 = 3.155844155844156
3.155844155844156 x 100 = 315.58%