Unit 6 Percents Review

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

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 x 0.20 = 10.

Front

What is the formula to find the original price after a discount?

Back

Original Price = Sale Price / (1 - Discount Rate). For example, if an item is on sale for $5.56 with a 20% discount, the original price is $5.56 / (1 - 0.20) = $6.95.

Front

How do you find the total number of students if you know the percentage of a group?

Back

Total Students = Number of Students / (Percentage as a decimal). For example, if 72 students represent 24%, then Total Students = 72 / 0.24 = 300.

Front

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

Back

It means that the price has been reduced by that percentage of the original price. For example, an 85% discount means you pay only 15% of the original price.

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 multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.

Front

What is the relationship between percent, fraction, and decimal?

Back

Percent is a fraction with a denominator of 100. To convert a percent to a decimal, divide by 100. To convert a decimal to a percent, multiply by 100.

Front

How do you find the percentage of a total area covered by a specific part?

Back

Percentage Covered = (Area of Part / Total Area) x 100. For example, if water covers 11,828 square miles of Florida's 65,755 square miles, the percentage is (11,828 / 65,755) x 100 = 18%.

Front

What is a discount?

Back

A discount is a reduction in the price of an item, usually expressed as a percentage of the original price.

Front

How do you calculate the amount of discount on an item?

Back

Discount Amount = Original Price x Discount Rate. For example, if an item costs $100 and has a 20% discount, the discount amount is $100 x 0.20 = $20.