80.24% is the change from 339 to 611
Calculation steps:
[( 611 - 339 ) ÷ 339] x 100 = 80.24%
Formula
Percentage change = [(611 - 339) / 339] x 100
Subtract the new number by the original number
611 - 339 = 272
272 ÷ 339 = 0.8023598820058997
0.8023598820058997 x 100 = 80.24%