Rates, Unit Rates, Unit Prices Practice

Front

What is a rate?

Back

A rate is a ratio that compares two different quantities, usually with different units, such as speed (miles per hour) or price (cost per item).

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit. It is often used to compare prices or speeds, such as $5 per pound.

Front

How do you calculate the unit price?

Back

To calculate the unit price, divide the total price by the number of units. For example, if a 12-pack of juice costs $6.59, the unit price is $6.59 ÷ 12.

Front

What is the formula for finding equivalent ratios?

Back

Two ratios are equivalent if their cross products are equal. For example, for ratios a/b and c/d, they are equivalent if a*d = b*c.

Front

How do you determine the better buy between two products?

Back

To determine the better buy, calculate the unit price for each product and compare them. The product with the lower unit price is the better buy.

Front

What is the unit rate of $40 for 5 pounds of concrete?

Back

The unit rate is $8 per pound, calculated by dividing $40 by 5.

Front

Are the ratios 4/1 and 20/5 equivalent?

Back

Yes, they are equivalent because 4*5 = 20 and 1*4 = 4.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, 1/2 = 2/4 is a proportion.

Front

How can you find a missing value in a proportion?

Back

To find a missing value in a proportion, use cross-multiplication. For example, if a/b = c/x, then a*x = b*c.

Front

What is the difference between a ratio and a rate?

Back

A ratio compares two quantities of the same kind, while a rate compares two quantities of different kinds, such as distance and time.