Rates and Ratios

Front

What is a ratio?

Back

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

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the total quantity by the number of units. For example, if 3 pounds of granola cost $3.75, the unit rate is $3.75 ÷ 3 = $1.25 per pound.

Front

What is the unit rate of 12 packs of juice boxes costing $6.59?

Back

The unit rate is $6.59 ÷ 12 = $0.549 per juice box.

Front

If Jack jumps 40 times in 4 minutes, how many times does he jump in 1 minute?

Back

Jack jumps 40 ÷ 4 = 10 times per minute.

Front

What operation do ratios primarily involve?

Back

Ratios primarily involve division.

Front

How do you find the price per item when given the total cost and quantity?

Back

To find the price per item, divide the total cost by the number of items. For example, $252 for 4 tickets means $252 ÷ 4 = $63 per ticket.

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 dollars per pound.

Front

If a 12 pack of juice boxes costs $6.59 and an 8 pack costs $4.79, which is the better buy?

Back

The 12 pack is the better buy because it has a lower cost per juice box.

Front

What is the formula for calculating a ratio?

Back

The formula for calculating a ratio is: Ratio = Quantity A : Quantity B.

Front

How can you express a ratio of 3 to 4?

Back

You can express it as 3:4 or as a fraction 3/4.