19.8% is the change from 409 to 490
Calculation steps:
[( 490 - 409 ) ÷ 409] x 100 = 19.8%
Formula
Percentage change = [(490 - 409) / 409] x 100
Subtract the new number by the original number
490 - 409 = 81
81 ÷ 409 = 0.1980440097799511
0.1980440097799511 x 100 = 19.8%