Sales Tax, Tip and Commission

12/9/14 – 12/10/14

Review of Basic Percent Problems

Method Set UpProportion Percent =

Percent Equation (missing the PART)

Percent (as a decimal) =

Percent (as a decimal) =

Percent Equation (missing the WHOLE)

Percent (as a decimal)× whole = part

Percent (as a decimal) × = part

Percent Equation (missing the PERCENT)

Percent (as a decimal) × whole = part

× whole = part

Vocabulary Tip: an optional payment to someone who provides

good service. This is in addition to the cost of the bill. Sales Tax: the amount added to the cost of an item. It

is usually a percent of the purchase price. Commission: a paid fee for services and is usually a

percent of the total cost. Discount: an amount that is subtracted from the

regular price of an item.

Percent Equations are used to solve these types of problems.

Example:

The price of a office chair was $96.00. The tax rate was 7%.

A. What was the tax on the office chair?

B. What was the total price of the office chair including tax?

Example:Find the total price of a $50.60 item plus 6.5% sales tax. There are two methods to solving.