129.5% is the change from 339 to 778
Calculation steps:
[( 778 - 339 ) ÷ 339] x 100 = 129.5%
Formula
Percentage change = [(778 - 339) / 339] x 100
Subtract the new number by the original number
778 - 339 = 439
439 ÷ 339 = 1.294985250737463
1.294985250737463 x 100 = 129.5%