What percent of earth's density does Jupiter have?

Density of Earth: 5.514 g/cm³

Density of Jupiter: 1.326 g/cm³

1.326 g/cm³ / 5.514 g/cm³ ≈ 0,24

0,24 * 100 = 24%

Jupiter has 24% of earth's density.

(Density numbers are from internet, you may calculate with your own ones if u have)