Solving Ratio Word Problems

There are 18 pieces of chalk. The ratio of chalk that is yellow to chalk that is not yellow is 1:2. How many pieces of chalk are yellow?

The ratio of students to teachers at a school is 19 :1. How many students are there in each total number of people 760?

You spend 90 minutes practicing flip tricks and slides on your skateboard. The ratio of time spent on flip tricks to time spent on slides is 7 : 8. How much time do you spend practicing slides?

An amusement park sells 5 bottles of water for every 2 bottles of juice. In one hour, the amusement park sells 20 bottles of water. How many bottles of juice does the amusement park sell.

• 9:5

• 9:4

• 81

• 81/36

While preparing for a triathlon, Janecia swims 8 minutes for every 20 minutes she bikes.  If she swims 72 minutes, how long does she bike for?

• 180 minutes

• 144 minutes

• 92 minutes

• 80 minutes

Diana uses 30 grams of coffee beans to make 48 fluid ounces of coffee. When guests come, she makes 96 fluid ounces of coffee. How many grams of coffee beans does Diana use when she has visitors?

Mathematical Equivalence

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For every 2 laps you swim, your friend swims 3 laps. You swim a total of 8 laps. How many laps does your friend swim?

For every 5 cars you wash, your friend washes 7 cars. Your wash a total of 20 cars. How many does your friend wash?

Edward had beaten 24 levels in a video game. If the ratio of levels he had beaten to not beaten was 3 : 1, how many levels does the game have total? Use a tape diagram to solve.

• 8

• 32

• 25

• 4