-99.79% is the change from 485 to 1
Calculation steps:
[( 1 - 485 ) ÷ 485] x 100 = -99.79%
Formula
Percentage change = [(1 - 485) / 485] x 100
Subtract the new number by the original number
1 - 485 = -484
-484 ÷ 485 = -0.9979381443298969
-0.9979381443298969 x 100 = -99.79%