We're beginning to see that skills build on top of each other to help us reach further and develop even more skills. In this case, our knowledge of fractions now helps us to solve unit rate problems like these. Common Core Standard: 6.RP.A.3b
Finding a unit rate is a skill often required in real life. How fast is that plane flying? How many lawns can you mow in an afternoon? You see, with our knowledge of ratios and fractions, we can now solve unit rates problems like this.