Ratios & Rates

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 to b' or a:b.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or price per item.

Front

How do you calculate the price per item?

Back

To find the price per item, divide the total cost by the number of items.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is 1. It shows how much of one quantity corresponds to one unit of another quantity.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms of the ratio by their greatest common divisor (GCD).

Front

What is the unit rate of 90 dollars for 5 hours?

Back

The unit rate is $18 per hour.

Front

If a store sees 120 customers in 8 hours, what is the unit rate?

Back

The unit rate is 15 customers per hour.

Front

Which is a better buy: 12 cans for $3.50 or 6 cans for $1.80?

Back

The better buy is the 12 pack of Coke.

Front

How do you find the better buy between two options?

Back

Calculate the price per item for each option and compare them.

Front

What does it mean to express a ratio in simplest form?

Back

Expressing a ratio in simplest form means reducing it to the smallest whole numbers that maintain the same relationship.