15.64% is the change from 390 to 451
Calculation steps:
[( 451 - 390 ) ÷ 390] x 100 = 15.64%
Formula
Percentage change = [(451 - 390) / 390] x 100
Subtract the new number by the original number
451 - 390 = 61
61 ÷ 390 = 0.1564102564102564
0.1564102564102564 x 100 = 15.64%