Rates, Ratios, proportions and percents

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, 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

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or price per item.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit, such as 60 miles per hour.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100. For example, 25% = 25 ÷ 100 = 0.25.

Front

What is 25% of 80?

Back

20

Tags

CCSS.6.RP.A.3C

Front

How do you find a percentage of a number?

Back

Multiply the number by the percentage (as a decimal). For example, to find 30% of 50, calculate 50 × 0.30 = 15.

Tags

CCSS.6.RP.A.3C

Front

What is the formula for finding a percent?

Back

Percent = (Part/Whole) × 100.

Front

What does the term 'proportion' mean?

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, what percent of the class are girls?

Back

75%.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2