143.9% is the change from 344 to 839
Calculation steps:
[( 839 - 344 ) ÷ 344] x 100 = 143.9%
Formula
Percentage change = [(839 - 344) / 344] x 100
Subtract the new number by the original number
839 - 344 = 495
495 ÷ 344 = 1.438953488372093
1.438953488372093 x 100 = 143.9%