-99.8% is the change from 498 to 1
Calculation steps:
[( 1 - 498 ) ÷ 498] x 100 = -99.8%
Formula
Percentage change = [(1 - 498) / 498] x 100
Subtract the new number by the original number
1 - 498 = -497
-497 ÷ 498 = -0.9979919678714859
-0.9979919678714859 x 100 = -99.8%