Lesson 1 Ratios

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

How do you write a ratio?

Back

Ratios can be written in three ways: using a colon (e.g., 2:3), as a fraction (e.g., 2/3), or with the word 'to' (e.g., 2 to 3).

Front

What does the ratio 4:11 represent?

Back

The ratio 4:11 means that for every 4 of one quantity, there are 11 of another quantity.

Front

If there are 11 stars and 5 circles, what is the ratio of stars to circles?

Back

The ratio of stars to circles is 11:5.

Front

If there are 13 boys and 10 girls, what is the ratio of boys to girls?

Back

The ratio of boys to girls is 13:10.

Front

What is the ratio of red apples to green apples if there are 4 red apples and 3 green apples?

Back

The ratio of red apples to green apples is 4:3.

Front

How do you simplify the ratio 10:15?

Back

To simplify the ratio 10:15, divide both numbers by their greatest common divisor, which is 5. The simplified ratio is 2:3.

Front

What is the ratio of dogs to all pets if there are 2 dogs, 4 cats, and 5 hamsters?

Back

The ratio of dogs to all pets is 2:11.

Front

If there are 5 boys and 7 girls, what is the ratio of girls to boys?

Back

The ratio of girls to boys is 7:5.

Front

What is the meaning of 'proportion' in relation to ratios?

Back

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