16.04% is the change from 449 to 521
Calculation steps:
[( 521 - 449 ) ÷ 449] x 100 = 16.04%
Formula
Percentage change = [(521 - 449) / 449] x 100
Subtract the new number by the original number
521 - 449 = 72
72 ÷ 449 = 0.1603563474387528
0.1603563474387528 x 100 = 16.04%