Writing Ratios
There are 10 girls and 13 boys in a class. Write the ratio of girls to boys in 3 ways.
10 to 13
10:13
10/13
Find the missing number to make equivalent ratios:
75 to 35 = ? to 7
15
Raquel has pairs of shoes and socks in a ratio of 3 to 5. If she has 27 pairs of shoes, then how many pairs of socks does she have?
45 pairs of socks
Radio station WMTH plays 2 minutes of news for every 20 minutes of music. Radio station WILM plays 4 minutes of news for every 30 minutes of music. If each radio station played 2 hours of music, then which station would have played less news? Explain.
Radio station WMTH would have played less news because in two hours it would play 12 minutes of news, but radio station WILM would play 16 minutes of news.
The three ways of writing a ratio are...
Using the word "to"
Using a colon
Writing as a fraction
There are 62 fish in a pond and 24 frogs in the pond. Write the ratio of frogs to fish in 3 ways.
24 to 62
24:62
24/62
Find the missing number to make equivalent ratios:
15/8=60/?
32
There are rulers and calculators in a ratio of 5 to 7. If there are 91 calculators, then how many rulers are there?
65 rulers
A homemade salad dressing has a ratio of soy sauce to lime juice in a ratio of 7:6. A store bought salad dressing has soy sauce to lime juice in a ratio of 11:9. If both salad dressings have 36 ounces of lime juice, then which one contains more dressing? Explain.
The store bought salad dressing has more dressing because it has 80 ounces of dressing, but the homemade salad dressing only has 78 ounces of dressing.
When you find an equivalent ratio, can you use that to find more equivalent ratios?
Yes
A school consists of 4 kindergarten classes, 5 first grade classes, 4 second grade classes, and 5 third grade classes. Write the ratio of first grade classes to total classes in 3 ways.
5 to 18
5:18
5/18
Find the missing number to make equivalent ratios:
10:?=25:20
8
A store sells bikes and scooters in a ratio of 5 to 2. If 85 bikes are sold one day, then how many scooters were sold?
34 scooters were sold
Fran buys socks in packages that contain 9 pairs of white socks for every 3 pairs of blue socks. Mia buys socks in packages with a ratio of 2 blue pairs to 4 white pairs. If the girls each bought 6 pairs of blue socks, then who will have more white socks? How many more?
Fran will have more white socks. She will have 6 more pairs.
Which operations can you use to make equivalent ratios?
A school consists of 4 kindergarten classes, 5 first grade classes, 4 second grade classes, and 5 third grade classes. Write the ratio of second and third grade classes to total classes in 3 ways.
9 to 18
9:18
9/18
Which of the following ratios are equivalent to 14:6? (Select all that apply)
a) 7:3
b) 28 to 15
c) 21 to 9
d) 20 to 12
a and c
A poster has red polka dots to yellow polka dots in a ratio of 4:6. If there are 10 red polka dots, then how many yellow polka dots are there?
15 yellow polka dots
Wendy bought 5 shirts for $72.50. Richie bought 8 shirts for $110. If they each bought 10 shirts, then who would pay less? How much less?
Richie would pay less for 10 shirts. He would pay $7.50 less.
Are these two ratios equivalent?
1/2 and 423/846
Yes
The sixth grade basketball team at a school has 25 girls and 32 boys. The seventh grade team has 15 girls and 12 boys. The eighth grade team has 18 girls and 22 boys. Write the ratio of sixth grade athletes to total athletes in 3 ways.
57 to 124
57:124
57/124
Which of the following ratios are equivalent to 27 to 36? (Select all that apply)
a) 56 to 72
b) 3:4
c) 81 to 108
d) 12 to 16
b, c, and d
Marley has short sleeve shirts and long sleeve shirts in a ratio of 5:3. If she has 40 short sleeve shirts, then how many total shirts does she have?
Marley has 64 total shirts.
A box of cookies has chocolate chip cookies and sugar cookies in a ratio of 10:7. Another box of cookies has chocolate chip cookies and double chocolate chunk cookies in a ratio of 8:5. Both boxes have 40 chocolate chip cookies. Which box has more cookies in total? How many more?
When you graph equivalent ratios, they will always form a ...
straight line