Percent Proportions

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is denoted by the symbol '%'. For example, 50% means 50 out of 100.

Front

How do you calculate the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (as a decimal). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Tags

CCSS.6.RP.A.3C

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

Tags

CCSS.7.RP.A.2A

Front

How do you set up a proportion to find a percent?

Back

To find a percent, set up a proportion where the part is over the whole, and the percent is over 100. For example, if you want to find what percent 9 is of 90, set it up as 9/90 = x/100.

Front

What is the formula for finding the total when given a part and a percent?

Back

The formula is: Total = Part / (Percent/100). For example, if 9 is 10% of a total, then Total = 9 / (10/100) = 90.

Tags

CCSS.6.RP.A.3C

Front

How do you find the tip amount based on a percentage?

Back

To find the tip amount, multiply the total bill by the tip percentage (as a decimal). For example, for a $28 meal with a 20% tip, calculate 28 * 0.20 = 5.60.

Tags

CCSS.6.RP.A.3C

Front

What is the relationship between part, whole, and percent?

Back

The relationship is defined by the formula: Percent = (Part / Whole) * 100. This shows how much of the whole is represented by the part.

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. For example, 1/4 = 0.25, and 0.25 * 100 = 25%.

Front

If 3 granola bars are 25% of the total, how do you find the total?

Back

Set up the equation: 3 = 0.25 * Total. To find Total, divide 3 by 0.25, which gives you 12.

Tags

CCSS.6.RP.A.3C

Front

How do you calculate the percent correct on a test?

Back

To calculate the percent correct, divide the number of correct answers by the total number of questions and multiply by 100. For example, 12 correct out of 15 gives (12/15) * 100 = 80%.