Jupiter contains about 2.5% of the total mass of the solar system.

Here's a breakdown:

* Jupiter's mass: 1.898 × 10²⁷ kg

* Solar System's total mass: ~ 1.989 × 10³⁰ kg (approximately 99.8% is the Sun's mass)

Therefore, Jupiter's mass divided by the solar system's total mass is approximately 0.025 or 2.5%.