Ratios & Proportions

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.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you express a ratio?

Back

Ratios can be expressed in three ways: as a fraction (a/b), with a colon (a:b), or in words (a to b).

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

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

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and set the products equal to each other.

Tags

CCSS.7.RP.A.2C

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit of another quantity.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you find the unit rate from a total?

Back

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

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What does 75% mean in terms of a fraction?

Back

75% means 75 out of 100, which can be simplified to the fraction 3/4.

Front

How do you convert a percentage to a fraction?

Back

To convert a percentage to a fraction, write the percentage over 100 and simplify if possible.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, and they represent the same relationship between quantities.

Tags

CCSS.6.RP.A.2

CCSS.6.RP.A.1

Front

How do you find the ratio of a part to a whole?

Back

To find the ratio of a part to a whole, divide the part by the whole and simplify.

Tags

CCSS.6.RP.A.2

CCSS.6.RP.A.1