Writing Ratios
There are 8 red pencils and 12 blue pencils.
What is the ratio of red pencils to blue pencils?
8:12 or 2:3
A lemonade recipe uses 2 cups of lemon juice for every 5 cups of water.
How many cups of water are needed for 4 cups of lemon juice?
10 cups
2 movie tickets cost $16.
Complete:
Tickets: 0 — 1 — 2 — 3 — 4
Cost: $0 — $___ — $16 — $___ — $___
$8, $24, $32
3 : 5 = 6 : ?
10
The tape diagram represents the ratio of cats to dogs:
Cats: ▭ ▭
Dogs: ▭ ▭ ▭
If there are 6 cats, how many dogs are there?
9 dogs
Which ratios are equivalent to 3:5?
Select ALL that apply.
A. 6:10
B. 9:15
C. 12:20
D. 15:30
Answer: A, B, C
A trail mix contains 3 cups of cereal for every 2 cups of pretzels.
If you use 6 cups of cereal, how many cups of pretzels do you need?
4 cups
3 notebooks cost $12.
How much do 6 notebooks cost?
Use a double number line.
$24
4 : 7 = ? : 21
12
The ratio of red to blue balloons is 2:3.
A tape diagram shows:
Red: ▭ ▭
Blue: ▭ ▭ ▭
If each box represents 4 balloons, how many balloons are there altogether?
20 balloons
A class has 18 students wearing sneakers and 12 wearing boots.
Write the ratio of:
sneakers : boots : total students
18:12:30
A smoothie recipe uses:
If you double the recipe, how many total pieces of fruit will you use?
Answer: 12 strawberries + 4 bananas = 16 pieces
A runner travels 4 miles in 32 minutes.
How many minutes will it take to travel 7 miles at the same rate?
56 minutes
5 : 8 = 20 : ?
32
The ratio of boys to girls is 3:5.
A tape diagram has:
Boys: ▭ ▭ ▭
Girls: ▭ ▭ ▭ ▭ ▭
There are 15 boys.
How many girls are there?
25 girls
Select ALL that are equivalent to 4:7.
A. 8:14
B. 12:21
C. 16:28
D. 20:30
E. 24:42
Answer: A, B, C, E
A paint mixture uses 3 cups of blue paint for every 5 cups of white paint.
You have 20 cups of white paint.
How many cups of blue paint are needed?
12 cups
A store sells 5 T-shirts for $75.
How much would 8 T-shirts cost?
Students should use a double number line.
$120
7 : 9 = ? : 45
35
A fruit basket has apples and oranges in a ratio of 2:3.
The tape diagram represents:
Apples: ▭ ▭
Oranges: ▭ ▭ ▭
There are 25 pieces of fruit altogether.
How many are apples?
10 apples
A ratio is equivalent to 7:9. The second number is 45.
What is the first number?
Answer: 35
A recipe calls for 2 cups of flour for every 3 cups of sugar.
You have 10 cups of flour.
How much sugar is needed to keep the recipe proportional?
15 cups
A car travels 210 miles in 3 hours.
Use a double number line to determine how far the car will travel in 7 hours.
490 miles
? : 12 = 15 : 36
5
The ratio of red, blue, and green marbles is:
2 : 3 : 4
There are 36 marbles altogether.
Use a tape diagram to determine how many of each color there are.
Answer:
🔴 8 red
🔵 12 blue
🟢 16 green