-22.22% is the change from 450 to 350
Calculation steps:
[( 350 - 450 ) ÷ 450] x 100 = -22.22%
Formula
Percentage change = [(350 - 450) / 450] x 100
Subtract the new number by the original number
350 - 450 = -100
-100 ÷ 450 = -0.2222222222222222
-0.2222222222222222 x 100 = -22.22%