Part-to-Part Ratios
There are 8 boys and 12 girls in a class. What is the ratio of boys to girls?
8:12 or 2:3
There are 5 red balls and 15 total balls. What fraction of the balls are red?
1/3
2/3 = ?/9. Find the missing number.
6
30 is what percent of 60?
50%
A recipe for 4 people uses 2 cups of rice. How many cups for 10 people?
5 cups
A basket has 15 apples and 10 oranges. Write the ratio apples:oranges in simplest form.
3:2
A box has 7 blue and 13 total pens. What percent are blue?
7/13 ≈ 53.8%
4/5 = 8/?. Find the missing denominator.
10
What is 20% of 50?
10
A map scale shows 1 inch = 5 miles. If two towns are 3 inches apart, how many miles is that?
15 miles
A jar contains 20 red marbles and 25 blue marbles. Find the ratio of red to blue.
4:5
In a group of 25 students, 10 are freshmen. What proportion are freshmen?
10/25 = 40%
7/21 = ?/3. Find the missing numerator.
1
If 45 is 75% of a number, what is the number?
60
3 notebooks cost $4.50. How much do 5 notebooks cost?
$7.50
In a race, 18 students ran and 12 walked. What is the ratio of runners to walkers?
3:2
There are 36 dogs, 9 of which are puppies. What percent are puppies?
9/36 = 25%
5/8 = ?/32. Find the missing numerator.
20
25 is 40% of what number?
62.5
A car uses 8 gallons of gas to drive 200 miles. How many miles per gallon?
25 mpg
There are 56 women and 84 men in a company. Simplify the ratio women:men.
2:3
A bag has 12 green marbles out of 40 total. What proportion are green?
12/40 = 30%
9/12 = ?/4. Find the missing numerator.
3
A sweater costs $48 after a 20% discount. What was the original price?
$60
If 6 workers build a wall in 9 days, how many workers are needed to build it in 3 days?
18