Fractions with Hours and Days

Question

So the question is:

The number of hours left in a day on Mars was $\frac{1}{4}$ on the number of hours that had already passed. How many hours were left in the day?

Day on Mars: $40$ hours.

I did $\frac{1}{4}\times40$ and got $10$. It seems a bit too simple of a solution, is this answer correct?

Answer 1

No, your solution is not correct. Let $x$ be the number of hours that already passed during the day. The number of hours remaining would then be $\dfrac{x}{4}$. Since a day is $40$ hours, you have

$$x+\frac{x}{4}=40$$ Can you continue?

Answer 2

The Solution

The number of hours left in a day on Mars was 1/4 on the number of hours that had already passed.

converts to $$x+\frac{x}{4} = 40$$

so

plug in and get

$$32+ \frac{32}{4} = 40$$

32 hours passed and there where 8 hours left.