-96.53% is the change from 490 to 17
Calculation steps:
[( 17 - 490 ) ÷ 490] x 100 = -96.53%
Formula
Percentage change = [(17 - 490) / 490] x 100
Subtract the new number by the original number
17 - 490 = -473
-473 ÷ 490 = -0.9653061224489796
-0.9653061224489796 x 100 = -96.53%