Question

An astronaut weighs 170 pounds on Earth and 400 pounds on Jupiter. The astronaut captures an alien that weighs 120 pounds on Jupiter. What is the alien's weight on Earth?
34 pounds
51 pounds
78 pounds
283 pounds

Answer 1

If you would like to know what is the alien's weight on Earth, you can calculate this using the following steps:

170 pounds on Earth ... 400 pounds on Jupiter
x pounds on Earth = ? ... 120 pounds on Jupiter

170 * 120 = 400 * x       /400
x = 170 * 120 / 400
x = 51 pounds on Earth

The correct result would be 51 pounds on Earth.