Unit 4: Basic Percents and Proportions Review

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the quantity of one item by the quantity of another item, ensuring the second quantity is 1.

Front

What is 40% of 110?

Back

44

Front

How do you calculate a percentage discount?

Back

To calculate a percentage discount, multiply the original price by the discount percentage (as a decimal) and subtract that amount from the original price.

Front

What is the formula for calculating sales tax?

Back

Sales Tax = Original Price x Sales Tax Rate.

Front

If a computer costs $1300 and is on sale for 10% off, what is the sale price?

Back

Sale Price = Original Price - (Original Price x Discount Rate) = $1300 - ($1300 x 0.10) = $1170.

Front

What is the total cost after applying a 15% discount and adding 6.5% sales tax to a $45 bill?

Back

Total Cost = (Original Price - Discount) + Sales Tax = ($45 - ($45 x 0.15)) + (($45 - ($45 x 0.15)) x 0.065) = $40.74.

Front

What is the unit rate if Kimberly can read 7 pages in 2 minutes?

Back

Unit Rate = Total Pages / Total Time = 7 pages / 2 minutes = 3.5 pages per minute.

Front

What does it mean to find a unit rate in a ratio?

Back

Finding a unit rate in a ratio means simplifying the ratio to show how much of one item corresponds to one unit of another item.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100.