-88% is the change from 450 to 54
Calculation steps:
[( 54 - 450 ) ÷ 450] x 100 = -88%
Formula
Percentage change = [(54 - 450) / 450] x 100
Subtract the new number by the original number
54 - 450 = -396
-396 ÷ 450 = -0.88
-0.88 x 100 = -88%
Example