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.

4/5

Solving Proportions

100

12/N = 20/25

15

200

5/8 = N/24

15

300

12/14 = N/21

18

400

2 / 4 = N/20

10

500

1 + 2/3 = N / 8

N=6

3/4

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 quart yellow to 3 quarts red. How much yellow should be mixed with 4 quarts of red?

24 quarts yellow

300

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

2 1/2 parts red

400

There are 20 dogs for every 8 cats in an animal shelter. If there are 140 cats and dogs total, how many are dogs?

100 dogs

500

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

1100 square feet

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 cups of water

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 liters of water

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

There ratio of apples to oranges in a fruit basket is 6 to 5. If there are 33 total pieces of fruit, how many apples are there?

18 apples

500

A bicycle store has a ratio of 12 blue to 16 red tricycles. If there are 420 tricycles, now many are red?

240 red tricycles