138.64% is the change from 339 to 809
Calculation steps:
[( 809 - 339 ) ÷ 339] x 100 = 138.64%
Formula
Percentage change = [(809 - 339) / 339] x 100
Subtract the new number by the original number
809 - 339 = 470
470 ÷ 339 = 1.3864306784660767
1.3864306784660767 x 100 = 138.64%