Question

Choose the ratio that you would use to convert 880 miles to yards. Remember that there are 1,760 yards in one mile.

Answer 1

You said it yourself :-) there are 1760 yards in one miles. They give you 880 miles. So the ratio will have miles in the denominator so that the miles unit will cancel. 1760 yards/mi. (It would be 1548800 yards btw) 
I hope this helps :-)

Answer 2

Answer:

880 miles are 1,548,000 yards.

Step-by-step explanation:

The first part of the problem says that you have 880 miles, and you want to convert it to yards, so you have:

$880 miles$

Now, the second part of the problem says that there are 1,760 yards in one mile, that is:

$\frac{1,760 yards}{1 mile}$

Then to resolve the problem you take the 880 miles and related it to the given ratio. You need to have special care with the units, so the unit "mile" that is the unit that you need to convert has to be in the denominator of the ratio that you want to use to convert the units:

$880miles*\frac{1,760yards}{1 mile}=1,548,800yards$