75.38% is the change from 390 to 684
Calculation steps:
[( 684 - 390 ) ÷ 390] x 100 = 75.38%
Formula
Percentage change = [(684 - 390) / 390] x 100
Subtract the new number by the original number
684 - 390 = 294
294 ÷ 390 = 0.7538461538461538
0.7538461538461538 x 100 = 75.38%