-1.8% is the change from 499 to 490
Calculation steps:
[( 490 - 499 ) ÷ 499] x 100 = -1.8%
Formula
Percentage change = [(490 - 499) / 499] x 100
Subtract the new number by the original number
490 - 499 = -9
-9 ÷ 499 = -0.018036072144288578
-0.018036072144288578 x 100 = -1.8%