Question

A year on Mars is 1.88 Earth years. If you are 13 years old on Earth, how old would you be on Mars?


I don't know if I am supposed to multiply or divide. I also don't understand what the question is trying to state.


Thanks

Answer 1

Use dimensional analysis with the ratio of Martian years to Earth years.


(1 Martian year / 1.88 Earth years)(13 Earth years) = 6.91 Martian years


The Earth years will cancel out and the remaining unit will be Martian years.


You are basically dividing your age by 1.88.

Answer 2

13/1.88

Don't be baffled by the decimal stuff. Just use easy numbers. If one Mars year were two earth years, birthdays would happen half (1/2) as often.