-98.78% is the change from 490 to 6
Calculation steps:
[( 6 - 490 ) ÷ 490] x 100 = -98.78%
Formula
Percentage change = [(6 - 490) / 490] x 100
Subtract the new number by the original number
6 - 490 = -484
-484 ÷ 490 = -0.9877551020408163
-0.9877551020408163 x 100 = -98.78%