2.42% is the change from 331 to 339
Calculation steps:
[( 339 - 331 ) ÷ 331] x 100 = 2.42%
Formula
Percentage change = [(339 - 331) / 331] x 100
Subtract the new number by the original number
339 - 331 = 8
8 ÷ 331 = 0.02416918429003021
0.02416918429003021 x 100 = 2.42%