Respuesta :

3:4 
because you do divide 15 to both side.
~JZ
Hope it helps
The answer is 3:4
Neuron
If you would like to write 45 minutes to 1 hour in the simplest form, you can do this using the following step:

1 hour = 60 minutes
45 minutes : 60 minutes = 45 : 60 = 3 : 4 (divide both numbers by 15)

The correct result would be 3 : 4.