Solving Ratio Problems

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:b'.

Front

How do you find the total amount when given a ratio and one part?

Back

To find the total amount, add the parts of the ratio together and then use the known quantity to find the other parts.

Front

If the ratio of red apples to green apples is 7:2 and there are 63 red apples, how many green apples are there?

Back

18 green apples.

Front

What is the combined amount of items when given a ratio and one quantity?

Back

Add the quantities represented by the ratio to find the total.

Front

How do you express the ratio of fiction to non-fiction books if 24 out of 52 books are fiction?

Back

The ratio is 7:6.

Front

What is the ratio of raisin cookies to oatmeal cookies if 72 raisin cookies were sold and the ratio is 9:1?

Back

8 oatmeal cookies.

Front

How do you calculate the amount of one ingredient in a recipe given the ratio of two ingredients?

Back

Use the ratio to set up a proportion based on the known quantity.

Front

If a recipe calls for a ratio of sugar to flour of 10:3 and you use 70 ounces of sugar, how much flour do you need?

Back

21 ounces of flour.

Front

What is the ratio of problems left to problems completed if a student has 15 problems total and completed 6?

Back

3:2.

Front

How do you simplify a ratio?

Back

Divide both sides of the ratio by their greatest common divisor.