45 minutes to 1 hour to simplest form

45 minutes : 1 hour

We need to make the units the same! This is crucial! If you do not have the proper units the whole answer is wrong!

45 minutes : 60 minutes

These are both divisible by 15:

3 minutes : 4 minutes

So, the ratio is 3 : 4

Final Answer: 3:4

Here, we need to write a ratio. A ratio compares two quantities.

45 to 1 hour

45:1

Final answer: 45:1