Proportions and Percents

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 calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, 30% of 20 is 20 * 0.30 = 6.

Tags

CCSS.6.RP.A.3C

Front

What is the formula for finding the percent of a total?

Back

Percent = (Part/Total) * 100.

Front

What does it mean if two quantities are proportional?

Back

If two quantities are proportional, it means that as one quantity changes, the other quantity changes at a constant rate.

Tags

CCSS.7.RP.A.2A

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100.

Front

What is the scale in a model?

Back

The scale in a model is the ratio of the model's dimensions to the actual dimensions.

Tags

CCSS.7.RP.A.2C

Front

If 200 children attended a play and 40% were boys, how many boys attended?

Back

80 boys attended the play.

Tags

CCSS.6.RP.A.3C

Front

What is the price per unit?

Back

The price per unit is calculated by dividing the total cost by the number of units purchased.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If Sarah earns $20 a day and spends 30% of it, how much does she spend?

Back

She spends $6.

Tags

CCSS.6.RP.A.3C

Front

What is a non-proportional relationship?

Back

A non-proportional relationship is when two quantities do not maintain a constant ratio.

Tags

CCSS.7.RP.A.2D