21.51% is the change from 279 to 339
Calculation steps:
[( 339 - 279 ) ÷ 279] x 100 = 21.51%
Formula
Percentage change = [(339 - 279) / 279] x 100
Subtract the new number by the original number
339 - 279 = 60
60 ÷ 279 = 0.21505376344086022
0.21505376344086022 x 100 = 21.51%