Rates, Proportions and Percents Unit Review

Front

What is a rate?

Back

A rate is a ratio that compares two different quantities, often expressed as a fraction. For example, speed is a rate that compares distance to time.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

Tags

CCSS.7.RP.A.2A

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (as a decimal). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

Tags

CCSS.6.RP.A.3C

Front

What is the formula for finding the total cost including tax?

Back

Total Cost = Price + (Price x Tax Rate). For example, if an item costs $100 and the tax rate is 8%, the total cost is $100 + ($100 x 0.08) = $108.

Tags

CCSS.6.RP.A.3C

Front

How do you find the sale price after a discount?

Back

Sale Price = Original Price - (Original Price x Discount Rate). For example, if a shirt costs $40 and is on sale for 25% off, the sale price is $40 - ($40 x 0.25) = $30.

Tags

CCSS.6.RP.A.3C

Front

What does it mean to split a bill evenly?

Back

To split a bill evenly means to divide the total amount by the number of people sharing the cost, so each person pays the same amount.

Tags

CCSS.3.OA.A.3

Front

How do you convert inches on a map to actual miles?

Back

To convert inches on a map to actual miles, multiply the number of inches by the scale factor. For example, if the scale is 1 inch = 40 miles, then 2.5 inches = 2.5 x 40 = 100 miles.

Tags

CCSS.6.RP.A.3B

Front

What is the relationship between variables in a graph?

Back

The relationship between variables in a graph shows how one variable changes in relation to another. For example, in a cost vs. quantity graph, as quantity increases, cost may also increase.

Tags

CCSS.8.EE.B.5

Front

How do you calculate the final price after applying a discount and tax?

Back

Final Price = (Original Price - Discount) + Tax on Discounted Price. For example, if an item costs $100, is 20% off, and has an 8% tax, calculate the discount, then the tax on the discounted price.

Tags

CCSS.6.RP.A.3C

Front

What is a tip and how is it calculated?

Back

A tip is a small amount of money given to service workers for their service. It is usually calculated as a percentage of the total bill. For example, a 15% tip on a $50 bill is $50 x 0.15 = $7.50.

Tags

CCSS.6.RP.A.3C