8.89% is the change from 450 to 490
Calculation steps:
[( 490 - 450 ) ÷ 450] x 100 = 8.89%
Formula
Percentage change = [(490 - 450) / 450] x 100
Subtract the new number by the original number
490 - 450 = 40
40 ÷ 450 = 0.08888888888888889
0.08888888888888889 x 100 = 8.89%