-90.61% is the change from 490 to 46
Calculation steps:
[( 46 - 490 ) ÷ 490] x 100 = -90.61%
Formula
Percentage change = [(46 - 490) / 490] x 100
Subtract the new number by the original number
46 - 490 = -444
-444 ÷ 490 = -0.9061224489795918
-0.9061224489795918 x 100 = -90.61%