Ratios and Proportions

Front

What is a Ratio?

Back

A ratio is a comparison of two quantities.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the simplest form of the ratio 6 red LEGOS to 3 yellow LEGOS?

Back

2/1

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If the ratio of boys to girls is 5:3, how many girls are there if there are 25 boys?

Back

15 girls.

Front

What does it mean to simplify a ratio?

Back

To simplify a ratio means to reduce it to its simplest form by dividing both quantities by their greatest common divisor.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

Write the ratio of 15 apples to 10 oranges in simplest form.

Back

3/2

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

2:3

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

In a class, the ratio of boys to girls is 4:5. If there are 36 students in total, how many boys are there?

Back

16 boys.

Front

What is a proportion?

Back

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

Tags

CCSS.7.RP.A.2A

Front

If 3/4 of a class are girls and there are 24 students, how many boys are there?

Back

6 boys.

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

Front

How do you solve a proportion?

Back

Cross-multiply and then solve for the variable.

Tags

CCSS.6.EE.B.7