Proportions

Ratios in lowest terms

100

Write 12 to 20 in lowest terms

3/5

200

Write 20 to 24 in lowest terms.

5/6

300

Write 14 to 21 in lowest terms.

2/3

400

Write 16 to 12 in lowest terms.

4/3

500

Write 12 to 8 in lowest terms.

3/2

Solving Proportions

100

12/N = 20/25

15

200

5/8 = N/24

15

300

12/14 = N/21

18

400

1/2 / 4 = N/20

2 1/2

500

1  1/2 / 3 = N / 8

4

Paint with Proportions

100

Apple Green paint is made by mixing 7 parts yellow to 3 parts blue. How much yellow should be mixed with 9 pints of blue?

21 pints

200

Peach paint is 1 part yellow to 3 parts red. How much yellow should be mixed with 4 quarts of red?

24

300

Purple paint is 5 parts blue to 1 part red. How much red should be mixed with 2 liters of blue?

2 1/2

400

Mix 4 parts yellow to 2 parts red to get orange. How much red and yellow should be mixed to get 2 gallons of orange?

8

500

Three gallons of paint will cover 825 square feet of walls. How much will 4 gallons cover?

1100

Cooking with Proportions

100

Gorp is 5 parts of peanuts and 2 parts of raisin. How many pounds of peanuts should be mixed with 1/2 pound of raisins?

1 1/4

200

Mix 6 parts of corn starch to 1 part water to make Glop. How much water should be used with 2 cups of corn starch?

1/3

300

Mix 3 liters of water with 2 lemons to make lemonade. How many liters of water are mixed with 1 lemon?

1 1/2

400

Oranges are selling at the rate of 12 oranges for a dollar. How much will 27 oranges cost?

$2.25

500

If 2 pounds of hamburger will serve 3 people, how many pounds of hamburger will serve 7 people?

4 2/3

Everyday problems

100

A car travels 240 miles on 15 gallons of gas. How far can the car travel on 20 gallons of gas?

320 miles

200

Mario can drive 250 miles in 4 hours. How far can he drive in 6 hours?

375 miles

300

At Sludge College, there are 5 women for every 4 men. If there are 372 men, how many women are there?

465 women

400

The scale on a map is 1 in to 15 miles. How far apart are two towns that are 6.4 inches apart on the map?

96 miles

500

A deluxe dollhouse was built to a 1:40 scale. If the dollhouse was 20 inches high, how high was the actual house?

800 inches