-99.79% is the change from 481 to 1
Calculation steps:
[( 1 - 481 ) ÷ 481] x 100 = -99.79%
Formula
Percentage change = [(1 - 481) / 481] x 100
Subtract the new number by the original number
1 - 481 = -480
-480 ÷ 481 = -0.997920997920998
-0.997920997920998 x 100 = -99.79%