Math hw that I don’t understand

Question

the ratio of the weight of an object on planet a to the weight of the same object on Planet B is 100 to 3. of an elephant weighs 2400 pounds on Planet A, find the elephants weight on Planet B.

Answer 1

Weight of elephant on planet A x (ratio of weight of elephant on planet B to planet A) = Weight of elephant on planet B.

2400 lbs (planet A) x (3/100) = 72 lbs