347.55% is the change from 143 to 640
Calculation steps:
[( 640 - 143 ) ÷ 143] x 100 = 347.55%
Formula
Percentage change = [(640 - 143) / 143] x 100
Subtract the new number by the original number
640 - 143 = 497
497 ÷ 143 = 3.4755244755244754
3.4755244755244754 x 100 = 347.55%