-97.35% is the change from 490 to 13
Calculation steps:
[( 13 - 490 ) ÷ 490] x 100 = -97.35%
Formula
Percentage change = [(13 - 490) / 490] x 100
Subtract the new number by the original number
13 - 490 = -477
-477 ÷ 490 = -0.9734693877551021
-0.9734693877551021 x 100 = -97.35%