Rates & Ratios

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.

Front

How do you simplify a ratio?

Back

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

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 item.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the quantity by the number of units. For example, if you travel 60 miles in 2 hours, the unit rate is 60 miles / 2 hours = 30 miles per hour.

Front

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

Back

10 times.

Front

Lynnette washes 95 cars in 5 days. How many cars does she wash each day?

Back

19 cars per day.

Front

Alicia drove 182.4 miles in 3 hours. What is her speed in miles per hour?

Back

60.8 miles per hour.

Front

Ken can walk 40 dogs in 8 hours. How many dogs can he walk in one hour?

Back

5 dogs per hour.

Front

Luke paints 91 portraits in 7 weeks. How many portraits does he paint each week?

Back

13 portraits per week.

Front

What is the formula for calculating a rate?

Back

Rate = Total Quantity / Time.