-2.22% is the change from 450 to 440
Calculation steps:
[( 440 - 450 ) ÷ 450] x 100 = -2.22%
Formula
Percentage change = [(440 - 450) / 450] x 100
Subtract the new number by the original number
440 - 450 = -10
-10 ÷ 450 = -0.022222222222222223
-0.022222222222222223 x 100 = -2.22%