Ratio, Proportion and Percentage Review

A crew of highway workers paved $\frac{2}{15}$ mile in 20 minutes. If they work at the same rate, what portion of a mile will they pave in one hour?

• $\frac{1}{150}$

• $\frac{2}{45}$

• $\frac{2}{5}$

• $\frac{5}{2}$

Suzanne bought a sweater at the sale price of $25. The original cost of the sweater was $40. What percent represents the discount that Suzanne received when buying the sweater?

• 15%

• 37.5%

• 60%

• 62.5%

Leo bought a used car for x dollars. One year later the value of the car was 0.88x. Which expression is another way to describe the change in the value of the car?

• 0.12% decrease

• 0.88% decrease

• 12% decrease

• 88% decrease

Julia’s service charge at a beauty salon was $72.60, before tax. The sales tax rate was 8%. If she added 20% of the amount before tax as a tip, how much did she pay for the service at the salon?

• $87.12

• $92.93

• $100.60

• $145.20

The label on a $1\frac{1}{2}$ -pound bag of wildflower seeds states that it will cover an area of 375 square feet. Based on this information, what is the number of square feet that 1 pound of wildflower seeds will cover?

• $\frac{1}{250}$

• $250$

• $562\frac{1}{2}$

• $750$

Ms. Graves gave her class 12 minutes to read. Carrie read $5\frac{1}{2}$ pages in that time. At what rate, in pages per hour, did Carrie read?

• $1\frac{1}{10}$

• 22

• $27\frac{1}{2}$

• 66

Jocelyn was shopping at a farmers’ market. She observed the prices of cucumbers at several stands. Which sign shows a proportional relationship in the pricing of the cucumbers?

• 5 for $2.50
  10 for $4.00
  15 for $5.50

• 5 for $2.50
  10 for $4.50
  15 for $6.50

• 5 for $2.00
  10 for $4.00
  15 for $6.00

• 5 for $1.50
  10 for $3.00
  15 for $6.00

Sally has a discount card that reduces the price of her grocery bill in a certain grocery store by 5%. If c represents the cost of Sally’s groceries, which expression represents Sally’s grocery bill?

• 0.05c

• 0.95c

• c - 0.05

• c + 0.95

The cost of oranges in a grocery store is directly proportional to the number of oranges purchased. Jerri paid $2.52 for 6 oranges. If p represents the cost, in dollars, and n represents the number of oranges purchased, which equation best represents this relationship?

• p=0.42n

• p=2.52n

• p=6n

• p=15.12n

Bananas cost $0.45 per pound. What equation is used to find C, the total cost of p pounds of bananas?

• C = 0.45p

• C = p + 0.45

• 0.45C = p

• 0.45 + C = p