Percent Problems Review

Front

What is a percent?

Back

A percent is a way of expressing 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 grade on a test?

Back

To calculate the percent grade, divide the number of correct answers by the total number of questions, then multiply by 100. For example, if you got 12 out of 15 correct: (12/15) * 100 = 80%.

Front

What is the formula to find the total number of items when given a part and its percent?

Back

The formula is: Total = Part / (Percent / 100). For example, if 36 quarters are 45% of the total, then Total = 36 / (45/100) = 80 coins.

Front

How do you find a percentage of a number?

Back

To find a percentage of a number, multiply the number by the percentage (as a decimal). For example, to find 4% of $6,800: 6800 * 0.04 = $272.

Front

What does it mean if a group represents a certain percent of a whole?

Back

It means that the group is a fraction of the total amount. For example, if 9 families represent 50% of all dog owners, then they make up half of the total dog owners.

Front

How do you calculate how much money was spent based on a percentage?

Back

To calculate the amount spent, multiply the total amount by the percentage spent (as a decimal). For example, if Sarah earns $20 and spends 30%, then she spent: 20 * 0.30 = $6.

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 the part compares to the whole in terms of percentage.

Front

What is a real-world example of using percentages?

Back

A real-world example is calculating sales tax. If an item costs $100 and the sales tax is 5%, the total cost is $100 + ($100 * 0.05) = $105.

Front

How can 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 = (1 ÷ 4) * 100 = 25%.

Front

What does it mean to find the 'whole' when given a 'part' and a 'percent'?

Back

Finding the 'whole' means determining the total amount from which the 'part' is derived. For example, if 36 is 45% of the total, the whole is 80.