15.01% is the change from 453 to 521
Calculation steps:
[( 521 - 453 ) ÷ 453] x 100 = 15.01%
Formula
Percentage change = [(521 - 453) / 453] x 100
Subtract the new number by the original number
521 - 453 = 68
68 ÷ 453 = 0.15011037527593818
0.15011037527593818 x 100 = 15.01%