-99.78% is the change from 450 to 1
Calculation steps:
[( 1 - 450 ) ÷ 450] x 100 = -99.78%
Formula
Percentage change = [(1 - 450) / 450] x 100
Subtract the new number by the original number
1 - 450 = -449
-449 ÷ 450 = -0.9977777777777778
-0.9977777777777778 x 100 = -99.78%