Ratios, Unit Rate, Better Buy Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a:b'.

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the total quantity by the number of units. For example, if you buy 4 tickets for $252, the unit rate is $252 ÷ 4 = $63 per ticket.

Front

What is the unit cost of an item?

Back

The unit cost is the total cost divided by the number of items purchased. It helps to determine how much each item costs individually.

Front

If a recipe calls for a ratio of 2:3 for sugar to flour, how much sugar is needed for 6 cups of flour?

Back

To find the amount of sugar needed, set up the ratio: (2/3) = (x/6). Solving gives x = 4 cups of sugar.

Front

What is the formula to find the price per item?

Back

Price per item = Total price ÷ Number of items.

Front

If there are 5 apples for every 3 oranges, what is the ratio of apples to oranges?

Back

The ratio of apples to oranges is 5:3.

Front

How do you find the total number of items sold given a ratio?

Back

Use the ratio to set up a proportion. For example, if the ratio is 5:3 and 24 brownies are sold, set up the equation 5/3 = x/24 to find x.

Front

What is a better buy?

Back

A better buy is determined by comparing unit prices of similar items to find which one offers more value for the cost.

Front

If Justin types 408 words in 4 minutes, how do you find his typing speed per minute?

Back

Divide the total words by the total minutes: 408 words ÷ 4 minutes = 102 words per minute.

Front

What does it mean if a ratio is simplified?

Back

A simplified ratio is expressed in its lowest terms, meaning that both quantities have been divided by their greatest common factor.