-99.8% is the change from 488 to 1
Calculation steps:
[( 1 - 488 ) ÷ 488] x 100 = -99.8%
Formula
Percentage change = [(1 - 488) / 488] x 100
Subtract the new number by the original number
1 - 488 = -487
-487 ÷ 488 = -0.9979508196721312
-0.9979508196721312 x 100 = -99.8%