Proportions from Ratios

What does f equal to make these two fractions a proportion?

Scott had to run for 18 minutes, ride his bike for 20 minutes, and lifted weights for 15 minutes. What is the ratio of the time he rode his bike to the total amount of time he exercised?

• 18:20

• 20:33

• 53:20

• 20:53

Write a ratio for 6 cups to 4 pints

What is the cost of 1 gallon of gas if you pay $31.20 for 15 gallons of gas? Hint: What is the unit rate?

• $1.95

• $0.15

• $2.08

• $10.00

Write this as a ratio:
17 out of 21 people believe in Santa Claus

• 21:17

• 17:38

• 17:21

• 17 people will get Christmas presents

Write this as a ratio:
12 out of 16 kids like french fries.

• 12:16

• 7 kids like ketchup also

• 1:2

• 3:4

True or False
A ratio is a comparison of numbers that can be written with words, a colon (:) or as a fraction.

• True

• False

Julian collected $32 from a school bake sale. The amount was 8% of the total collected by the class. How much money was collected by the class in all?

• $40

• $410

• $400

• $67

Choose which answer shows a unit rate. 

• 5 students to 2 teachers

• 18 candies per box

• 14 pens to 7 pencils

• 22 students: 2 buses 

One music site sells 15 song downloads for $6.75. Another site is selling 12 downloads for $5.76.  Which is the better deal?

• 12 is best because songs are $1

• 15 songs is better because each song is 30 cents

• 12 is best because each song is 50 cents

• 15 songs is better because each song is 45 cents