82.05% is the change from 390 to 710
Calculation steps:
[( 710 - 390 ) ÷ 390] x 100 = 82.05%
Formula
Percentage change = [(710 - 390) / 390] x 100
Subtract the new number by the original number
710 - 390 = 320
320 ÷ 390 = 0.8205128205128205
0.8205128205128205 x 100 = 82.05%