Ratios Unit Review

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' or a:b.

Front

How do you simplify a ratio?

Back

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

Front

What does a ratio of 1 to 3 mean?

Back

A ratio of 1 to 3 means that for every 1 part of the first quantity, there are 3 parts of the second quantity.

Front

If there are 4 purple marbles and 9 yellow marbles, what is the ratio of purple to yellow marbles?

Back

The ratio of purple to yellow marbles is 4:9.

Front

How do you express a ratio as a fraction?

Back

A ratio can be expressed as a fraction by placing the first quantity over the second quantity. For example, a ratio of 4:9 can be written as 4/9.

Front

What is the relationship between ratios and fractions?

Back

Ratios and fractions both represent a relationship between two quantities, but ratios compare two different quantities while fractions represent a part of a whole.

Front

If the ratio of triangles to stars is 1 to 3, how many stars are there if there is 1 triangle?

Back

If there is 1 triangle, there are 3 stars.

Front

What is the equivalent ratio of 2:5 if both terms are multiplied by 3?

Back

The equivalent ratio is 6:15.

Front

How can you find a missing value in a proportion?

Back

To find a missing value in a proportion, use cross-multiplication and solve for the unknown.

Front

If the ratio of boys to girls in a class is 3:4 and there are 12 boys, how many girls are there?

Back

There are 16 girls in the class.