-99.8% is the change from 494 to 1
Calculation steps:
[( 1 - 494 ) ÷ 494] x 100 = -99.8%
Formula
Percentage change = [(1 - 494) / 494] x 100
Subtract the new number by the original number
1 - 494 = -493
-493 ÷ 494 = -0.9979757085020243
-0.9979757085020243 x 100 = -99.8%