Proportions, rates and ratios

Everyday after work Juan rides his bike home, which is a distance of 4.2 kilometers. Which proportion can be used to change 4.2 kilometers to meters?

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Julian has 15 quarters, 20 dimes and 10 pennies. Express the quarters to total coins as a ratio.

• $\frac{1}{2}$

• $\frac{3}{4}$

• $\frac{15}{1}$

• $\frac{1}{3}$

Ms. Short reads 3 books in 7.5 hours. At this rate, how many books can Ms. Short read in one hour?

• 22.5

• 2.5

• 0.4

• 0.04

An assortment of candies are sold in a 1 pound bag. If there are three peppermint candies for every ten candies in the bag, what proportion can find the number of peppermints in a 45 piece bag?

• $\frac{x}{45\ }=\ \frac{3}{30}$

• $\frac{30}{45}\ =\ \frac{3}{x}$

• $\frac{x}{45}\ =\ \frac{10}{3}$

• $\frac{x}{45}\ =\ \frac{3}{10}$

A bag of pens has six red pens and nine blue pens. What fraction of the pens are red?

• $\frac{1}{3}$

• $\frac{2}{3}$

• $\frac{2}{5}$

• $\frac{3}{5}$

Vivian pays $178 every 4 months for her voice lessons. At this rate, how much will Vivian pay for 3 years of voice lessons?

• $534

• $2,136

• $1,602

• $712

Jose swims 3 laps in a pool every 2 minutes. How long would it take him to swim 27 laps?

• 8 minutes
• 9 minutes
• 16 minutes
• 18 minutes

Tags

CCSS.6.RP.A.3B

Solve the proportion:

• 4
• 8
• 14
• 10

Tags

CCSS.7.RP.A.2B

Solve for x

• x=6
• x =1/6
• x = 7
• x=9

Tags

CCSS.7.RP.A.2B

In an animal shelter, the ratio of dogs to cats is 5 to 3. There are 25 dogs.  Write and solve a proportion to find the number c of cats.

• c=15
• c=18
• c=21
• c=16

Tags

CCSS.6.EE.B.6

CCSS.6.EE.B.7

CCSS.6.RP.A.1

CCSS.6.RP.A.3