31.79% is the change from 390 to 514
Calculation steps:
[( 514 - 390 ) ÷ 390] x 100 = 31.79%
Formula
Percentage change = [(514 - 390) / 390] x 100
Subtract the new number by the original number
514 - 390 = 124
124 ÷ 390 = 0.31794871794871793
0.31794871794871793 x 100 = 31.79%