18.12% is the change from 447 to 528
Calculation steps:
[( 528 - 447 ) ÷ 447] x 100 = 18.12%
Formula
Percentage change = [(528 - 447) / 447] x 100
Subtract the new number by the original number
528 - 447 = 81
81 ÷ 447 = 0.18120805369127516
0.18120805369127516 x 100 = 18.12%