80.51% is the change from 390 to 704
Calculation steps:
[( 704 - 390 ) ÷ 390] x 100 = 80.51%
Formula
Percentage change = [(704 - 390) / 390] x 100
Subtract the new number by the original number
704 - 390 = 314
314 ÷ 390 = 0.8051282051282052
0.8051282051282052 x 100 = 80.51%