Aperson who weight 100 pounds on earth weighs 16.6 pounds on the moon. what is an equation that relates weight on earth to weight on the moon

When you are on the moon, your mass is 6% of your original weight. 100 divided by 16.6 = 6.024096385542. so orig. M\16.6 = M on moon

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.