-31.51% is the change from 657 to 450
Calculation steps:
[( 450 - 657 ) ÷ 657] x 100 = -31.51%
Formula
Percentage change = [(450 - 657) / 657] x 100
Subtract the new number by the original number
450 - 657 = -207
-207 ÷ 657 = -0.3150684931506849
-0.3150684931506849 x 100 = -31.51%