15.3% is the change from 451 to 520
Calculation steps:
[( 520 - 451 ) ÷ 451] x 100 = 15.3%
Formula
Percentage change = [(520 - 451) / 451] x 100
Subtract the new number by the original number
520 - 451 = 69
69 ÷ 451 = 0.15299334811529933
0.15299334811529933 x 100 = 15.3%