-4% is the change from 450 to 432
Calculation steps:
[( 432 - 450 ) ÷ 450] x 100 = -4%
Formula
Percentage change = [(432 - 450) / 450] x 100
Subtract the new number by the original number
432 - 450 = -18
-18 ÷ 450 = -0.04
-0.04 x 100 = -4%
Example