Austin is going to the movie theater. it is 3 and3/5 miles from his house. austin takes his scooter, but it breaks down 2/3 of the way to the theater. how far is austin from his house?

2 and 14/15
Because the first step of subtraction is common denominators

What I would do is find a similar denominator for 3/5 and 2/3 (15).
Next, I would multiply 5x3 =15 and 3x5= 15. If you do something to the bottom then, you need to do it to the top.
3x3= 9
2x5= 10
Finally you subtract each other but, if the second number is higher than the first and the first has a whole, you add the whole. 
2 24/15- 10/15= 2 14/15
So, Austin is 2 and 14/15 miles away from his house.