6th Grade Math Textbook, Fundamentals

 &KDSWHU

7-10

marked price

total cost

0%

tax

100% 6%

Sales Tax and Tips

Objective To calculate sales tax and total cost• To read and use a tax table

• To calculate a tip and total cost

A calculator is priced at $29.95 with a sales tax of 6%.
What is the amount of sales tax to the nearest cent?
What is the total cost?

To find the total cost of the calculator, find the amount
of sales tax and add it to the marked price.

is the amount of tax added to the
of an item by a state or local government. The
is the ratio of the amount of sales tax to the marked
price expressed as a percent. The of an item
is the sum of its marked price and the amount of
sales tax.

You can write and solve an equation or a proportion

to find the amount of sales tax.

Method 1 Write and Solve an Equation

amount of sales tax sales tax rate • marked price

Let Tthe amount of sales tax.

T6% • $29.95

T0.06• $29.95 Write 6% as a decimal, then multiply.

T$1.7970 $1.80 Round to the nearest cent.

Method 2 Write and Solve a Proportion





100 T6 • 29.95

 Divide both sides by 100.

T1.797 $1.80 Round to the nearest cent.

Using either method, you find that the amount of sales tax is $1.80.

Add $1.80 to the marked price to find the total cost.

$29.95 $1.80 $31.75.

So the total cost of the calculator is $31.75.

Substitute 29.95 for MPand 6 for the sales tax rate.

Cross multiply.

179.70

100

100 T

100

6

100

T

29.95

part

whole

sales tax rate (%)

100

sales tax (T)

marked price (MP)

rate

Sales tax

total cost

sales tax

marked price

Multiply the marked price, $29.95,

by the sales tax rate, 6%.

Key Concept

Sales Tax

sales tax sales tax rate • marked price