-45.56% is the change from 450 to 245
Calculation steps:
[( 245 - 450 ) ÷ 450] x 100 = -45.56%
Formula
Percentage change = [(245 - 450) / 450] x 100
Subtract the new number by the original number
245 - 450 = -205
-205 ÷ 450 = -0.45555555555555555
-0.45555555555555555 x 100 = -45.56%