Ratios, Rates and Proportions

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'.

Front

How do you write the ratio of girls to boys if there are 7 girls and 5 boys?

Back

7 to 5

Front

If the ratio of boys to girls is 6:5 and there are 18 boys, how many girls are there?

Back

15 girls.

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two quantities with different units, such as miles per hour or price per item.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

If 8 out of 12 kittens are grey, what is the ratio of orange kittens to grey kittens?

Back

The ratio of orange kittens to grey kittens is 4 to 8.

Front

How do you find the unit price of an item?

Back

To find the unit price, divide the total price by the number of units.

Front

What is the unit price of Daisy sour cream if it costs $1.68 for 8 oz?

Back

The unit price is $0.21 per oz.

Front

What is the unit price of Kraft sour cream if it costs $2.08 for 16 oz?

Back

The unit price is $0.13 per oz.

Front

Which is the better deal: Daisy sour cream or Kraft sour cream?

Back

Kraft sour cream is the better deal.