Ratio Tables, Rates, Unit 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 cost per item.

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit, such as 60 miles per hour (60 miles in 1 hour).

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity to find the amount per one unit.

Front

If 3 pounds of lunch meat cost $20.25, what is the cost per pound?

Back

$20.25 ÷ 3 = $6.75 per pound.

Front

If a car travels 180 miles using 6 gallons of gas, how do you find the miles per gallon?

Back

Divide the total miles by the total gallons: 180 miles ÷ 6 gallons = 30 miles per gallon.

Front

How do you find the total cost for a different quantity using a ratio table?

Back

Set up a ratio table with the known quantity and cost, then find the equivalent cost for the desired quantity.

Front

What is the formula to find the cost of multiple items if you know the cost of one?

Back

Cost of multiple items = (Cost of one item) × (Number of items).

Front

If 13 peaches cost $8.84, how do you find the cost of one peach?

Back

Divide the total cost by the number of peaches: $8.84 ÷ 13 = $0.68 per peach.

Front

How do you calculate the total cost for 7 peaches if one peach costs $0.68?

Back

Total cost = $0.68 × 7 = $4.76.