-98.6% is the change from 499 to 7
Calculation steps:
[( 7 - 499 ) ÷ 499] x 100 = -98.6%
Formula
Percentage change = [(7 - 499) / 499] x 100
Subtract the new number by the original number
7 - 499 = -492
-492 ÷ 499 = -0.9859719438877755
-0.9859719438877755 x 100 = -98.6%