Proportions and percentages

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 convert a percentage to a fraction?

Back

To convert a percentage to a fraction, divide the percentage by 100 and simplify if possible.

Front

What is the formula to find a percentage of a number?

Back

The formula is: (Percentage / 100) x Total Number.

Front

What does it mean if a price is marked down by a percentage?

Back

It means the price is reduced by that percentage of the original price.

Tags

CCSS.6.RP.A.3C

Front

How do you find the ratio of two quantities?

Back

To find the ratio, divide one quantity by the other and express it in simplest form.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is 50% of a number?

Back

50% of a number is half of that number.

Tags

CCSS.6.RP.A.3C

Front

If 30% of a class of 40 students are girls, how many girls are in the class?

Back

12 girls (30% of 40 is 12).

Tags

CCSS.6.RP.A.3C

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions show that two ratios are equal.

Tags

CCSS.6.RP.A.3A

Front

How do you calculate the percentage increase?

Back

Percentage increase = ((New Value - Original Value) / Original Value) x 100.

Tags

CCSS.6.RP.A.3C

Front

What is a percentage?

Back

A percentage is a fraction expressed as a part of 100.