82.31% is the change from 390 to 711
Calculation steps:
[( 711 - 390 ) ÷ 390] x 100 = 82.31%
Formula
Percentage change = [(711 - 390) / 390] x 100
Subtract the new number by the original number
711 - 390 = 321
321 ÷ 390 = 0.823076923076923
0.823076923076923 x 100 = 82.31%