Ratio and Proportional

• 3 miles per hour

• 4 miles per hour

• 5 miles per hour

• 6 miles per hour

• 12 pounds

• 14 pounds

• 16 pounds

• 20 pounds

The aspect ratio, the ratio of the width to the height, of various computer monitors is listed in the table below.

Which monitor has an aspect ratio different from the other three?

• Monitor A

• Monitor B

• Monitor C

• Monitor D

Answer explanation

Divide the widths by heights and compare the results.

Sam reads 30 pages of a book in 40 minutes. Which statement identifies a person with the same reading rate as Sam?

• Francine reads 40 pages in 55 minutes.   

• Leroy reads 22.5 pages in 30 minutes.

• Paul reads 150 pages in 3.25 hours.

• Bill reads 60 pages in 2 hours.

Answer explanation

Divide the number of pages by the minutes.

Compare answer with the options.

The correct answer has the same fraction as the one in the question.

A store sells bananas by weight. The total cost to buy 5 pounds of bananas is $3.75. Which choice shows how to correctly calculate the total cost, T, to buy 2 pounds of bananas?

• T = 3.75(2)                 

• T = 1.75(2)            

• T = 0.75(2)            

• T = 0.50(2)

Answer explanation

Divide the cost of banana by the number of pounds to get the constant.

The table shows the relationship between the actual height of an object, in centimeters, and the height of its projected image on a screen in inches. Which graph represents a line containing the data shown in the table?

• 
• 
• 
• 

Using the graph below, what is the constant of proportionality?

• 2.5

• 4.0

• 4.5

• 7.0

Answer explanation

Divide the value of y by the value of x.

The table represents the cost to eat at a buffet-style restaurant. Which equation could be used to calculate the cost, C, for any number of people, p, to eat at the restaurant?

• C = p + 13.77

• C = p + 27.54    

• C = 13.77p

• C = 27.54p

Answer explanation

Divide cost by the number of people.

The price of a pair of jeans decreases from $45 to $40. What is the approximate percentage of decrease?

• 1%

• 11%

• 13%

• 89%

Answer explanation

Subtract the two values

Divide answer by the first value

Multiply by 100

At a sale at an electronics store, a plasma television originally priced at $500 is marked 15% off. What is its selling price?

• $425   

• $485      

• $515  

• $575