Simplify the ratio. 45 minutes to 1 hour

1 hour can be simplified to 60 minutes because there are 60 minutes in one hour thus, the ratio becomes 45:60 if we want to simplify that even more, we have to divide both numbers by 5 45/5 = 9 60/5 = 12 therefore, the ratio becomes 9:12

H=hours

M=minutes

You convert 1 hour into 60 minutes

So your ratio would be 60:45

Then you find the common denominator, which the highest is 15

Divide by both

45:15=3

60:15=4

Therefore, your ratio would be 3:4