82.56% is the change from 390 to 712
Calculation steps:
[( 712 - 390 ) ÷ 390] x 100 = 82.56%
Formula
Percentage change = [(712 - 390) / 390] x 100
Subtract the new number by the original number
712 - 390 = 322
322 ÷ 390 = 0.8256410256410256
0.8256410256410256 x 100 = 82.56%