-87.56% is the change from 450 to 56
Calculation steps:
[( 56 - 450 ) ÷ 450] x 100 = -87.56%
Formula
Percentage change = [(56 - 450) / 450] x 100
Subtract the new number by the original number
56 - 450 = -394
-394 ÷ 450 = -0.8755555555555555
-0.8755555555555555 x 100 = -87.56%