-45.32% is the change from 823 to 450
Calculation steps:
[( 450 - 823 ) ÷ 823] x 100 = -45.32%
Formula
Percentage change = [(450 - 823) / 823] x 100
Subtract the new number by the original number
450 - 823 = -373
-373 ÷ 823 = -0.4532199270959903
-0.4532199270959903 x 100 = -45.32%