What is the total mass of all the planets in our Solar System? What fraction of this total planetary mass does Jupiter represent? What fraction does Earth represent?
From Planetary Fact Sheet - Metric, NASA:
MERCURY VENUS EARTH MARS JUPITER
0.330 4.87 5.97 0.642 1898
SATURN URANUS NEPTUNE
568 86.8 102.00
The ratio (Jupiter mass)/(8-planet total mass)
The ratio (Earth mass)/(8-planet total mass)