13.6% is the change from 397 to 451
Calculation steps:
[( 451 - 397 ) ÷ 397] x 100 = 13.6%
Formula
Percentage change = [(451 - 397) / 397] x 100
Subtract the new number by the original number
451 - 397 = 54
54 ÷ 397 = 0.13602015113350127
0.13602015113350127 x 100 = 13.6%