Answer: 6 miles per hour
Step-by-step explanation: To find the unit rate for the following situation, I have rewritten the problem to say 12 miles in 2 hours = ___ miles per hour since we want to find how many miles you run in 1 hour.
"Per hour" means in 1 hour, so we can rewrite the given statement using fractions as 12 miles over 2 hours = ___ miles per hour.
To find out what goes in the blank, notice that we have a 1 in the denominator of our second fraction. So we want to find a fraction equivalent to 12/2 that has a 1 in the denominator. If we divide the numerator and denominator of 12/2 by 2, we get the equivalent fraction 6/1 or 6 miles over 1 hour.
So now we have 6 miles over 1 hour = ___ miles per hour. So a 6 must go in the blank which means that the unit rate for 12 miles in 2 hours is 6 miles per hour.