-53.56% is the change from 450 to 209
Calculation steps:
[( 209 - 450 ) ÷ 450] x 100 = -53.56%
Formula
Percentage change = [(209 - 450) / 450] x 100
Subtract the new number by the original number
209 - 450 = -241
-241 ÷ 450 = -0.5355555555555556
-0.5355555555555556 x 100 = -53.56%