Unit rate problems

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'per' something, like miles per hour or cost per item.

Front

How do you find the unit rate from a total cost and quantity?

Back

To find the unit rate, divide the total cost by the quantity. For example, if you spend $40 on 5 pounds of concrete, the unit rate is $40 ÷ 5 = $8 per pound.

Front

If a store sees 120 customers in 8 hours, how do you find the number of customers per hour?

Back

Divide the total number of customers by the total hours: 120 customers ÷ 8 hours = 15 customers per hour.

Front

What is the unit rate if you can buy 3 apples for $1.20?

Back

To find the unit rate, divide the total cost by the number of apples: $1.20 ÷ 3 apples = $0.40 per apple.

Front

How do you calculate the total cost of 10 apples if you know the unit rate?

Back

Multiply the unit rate by the number of apples: If the unit rate is $0.40 per apple, then 10 apples cost 10 × $0.40 = $4.00.

Front

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

Back

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

Front

How do you find out how many words Justin can type in 7 minutes?

Back

Multiply his typing speed by the number of minutes: 102 words/minute × 7 minutes = 714 words.

Front

What is the price per gallon if you paid $15.00 for 6 gallons of gasoline?

Back

To find the price per gallon, divide the total cost by the number of gallons: $15.00 ÷ 6 gallons = $2.50 per gallon.

Front

What is the importance of finding unit rates in real-life situations?

Back

Finding unit rates helps compare prices, speeds, and other quantities, making it easier to make informed decisions.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.