-99.79% is the change from 478 to 1
Calculation steps:
[( 1 - 478 ) ÷ 478] x 100 = -99.79%
Formula
Percentage change = [(1 - 478) / 478] x 100
Subtract the new number by the original number
1 - 478 = -477
-477 ÷ 478 = -0.997907949790795
-0.997907949790795 x 100 = -99.79%