62.56% is the change from 390 to 634
Calculation steps:
[( 634 - 390 ) ÷ 390] x 100 = 62.56%
Formula
Percentage change = [(634 - 390) / 390] x 100
Subtract the new number by the original number
634 - 390 = 244
244 ÷ 390 = 0.6256410256410256
0.6256410256410256 x 100 = 62.56%