4-1 and 4-2 Ratios and 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 in simplest form.

Front

How do you write a ratio in simplest form?

Back

To write a ratio in simplest form, divide both quantities by their greatest common factor.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit of another quantity.

Front

If Sam drove 220 miles on 8 gallons of gas, what is the unit rate in miles per gallon?

Back

27.5 mpg

Front

What is the ratio of red LEGOS to yellow LEGOS if there are 3 red and 6 yellow?

Back

1/2

Front

How many pencils are there in 8 boxes if each box contains 12 pencils?

Back

96 pencils

Front

What is the missing value in the ratio table if the ratio is 3:9?

Back

27 (if the table is scaled up by a factor of 3).

Front

What does it mean to simplify a ratio?

Back

To simplify a ratio means to reduce it to its lowest terms by dividing both sides by the same number.

Front

If the ratio of cats to dogs is 4:5, how many dogs are there if there are 20 cats?

Back

25 dogs (since 20 cats is 4 times 5, so 5 times 5 is 25).

Front

What is the ratio of blue LEGOS to total LEGOS if there are 8 blue, 6 yellow, and 3 red?

Back

8/17 (total LEGOS = 8 + 6 + 3 = 17).