Understanding Ratio Concepts
Mrs. Duncan is decorating her Christmas tree. For every 5 red ornaments, there are 3 silver ornaments. Draw a model to show the ratio of RED ornaments to SILVER ornaments.
R R R R R S S S
The Mazda car dealership expects to sell 15 cars every 5 days. How many days should it take to sell 45 cars?
15 days
Mr. Collier is making an orange smoothie. The recipe calls for 3 parts yogurt to 5 parts orange juice. How many ounces of yogurt and how many ounces of orange juice does he need to get a total of 16 ounces?
6 ounces yogurt and 10 ounces orange juice (6:10)
Dylan has a collection of shark teeth. He identified them as 6 tiger shark teeth and 8 sand shark teeth. The rest are hammerhead shark teeth. What does the ratio 6:8 represent in this situation?
The ratio of tiger shark teeth to sand shark teeth.
Write 3 equivalent ratios for 3:2
6:4, 9:6, 12:8, etc.
Mr. Akil uses red and green ornaments to decorate his tree. The ratio of red ornaments to green ornaments is 4:5. He plans to use 180 ornaments. How many of each color of ornament does he need?
80 red ornaments and 100 green ornaments (80:100)
Dylan has a collection of shark teeth. He identified them as 6 tiger shark teeth and 8 sand shark teeth. The rest are hammerhead shark teeth. What is the ratio of hammerhead teeth to total teeth?
4:18
For every 25 miles I drive in my car, it takes 1 gallon of gas. Based on this ratio, how many gallons of gas will it take to drive 150 miles?
6 gallons
An artist is making a mosaic using red and blue glass tiles. He uses a total of 600 tiles. The ratio of red tiles to blue tiles is 1:2. How many RED tiles does he use?
200 red tiles.
Mrs. Johnson makes trail mix with cashews, pretzels, and chocolate. The ratio of cups of chocolate to cups of cashews is 1 to 6. The ratio of cups of pretzels to cups of chocolate is is 3 to 1. What is the ratio of cashews to pretzels?
6:3 (6 cups of cashews for every 3 cups of pretzels)
Kelly combines peaches and cherries to make fruit salad. The ratio of cups of peaches to cups of cherries is 2 to 3. How many cups of peaches will Kelly need if she has 60 cups of cherries?
40 cups of peaches
A biologist collects 80 butterflies and moths. He collects 4 butterflies for every moth. How many moths did he collect?
16 moths.
Mrs. Gray's flower bed has 3 types of flowers. There are 7 lilies, 5 tulips, and 6 daisies. What does the ratio 5:18 represent in this situation?
The ratio of tulips to total flowers.
A chef planning for a large banquet thinks that 2 out of every 5 dinner guests will order his soup appetizer. He expects 400 guests at the banquet. Use equivalent ratios to figure out how many cups of soup he should prepare.
160 cups of soup.
A florist sells 70 roses. Of those roses, 4 out of every 10 are red. How many red roses does the florist sell?
20 red roses