-98.57% is the change from 490 to 7
Calculation steps:
[( 7 - 490 ) ÷ 490] x 100 = -98.57%
Formula
Percentage change = [(7 - 490) / 490] x 100
Subtract the new number by the original number
7 - 490 = -483
-483 ÷ 490 = -0.9857142857142858
-0.9857142857142858 x 100 = -98.57%