-99.18% is the change from 490 to 4
Calculation steps:
[( 4 - 490 ) ÷ 490] x 100 = -99.18%
Formula
Percentage change = [(4 - 490) / 490] x 100
Subtract the new number by the original number
4 - 490 = -486
-486 ÷ 490 = -0.9918367346938776
-0.9918367346938776 x 100 = -99.18%