1

2

Sales tax is calculated by finding the percent of the

total purchase.

3

To find the amount of sales tax on a purchase, you

multiply the tax rate by the sum of the prices of the

items purchased.

4

You will first need to change the amount of tax

from percent to the decimal equivalent.

5

When changing the tax rate from a percent to a decimal, first change the percent to a fraction with a denominator

of 100.

6 % = 100

6= 0.06

6

6 % =

Find the amount of tax on a purchase of $25.99 if

the tax rate is 6 %.

100

6= 0.06

7

6 % = 100

6= 0.06

Using a calculator multiply $25.99 times 0.06 by

entering the following into the calculator:

25.99 X 0.06 =

8

25.99 X 0.06 = 1.5594

Use the calculator to round 1.5594 to the hundredths

place by using the Fix function key.

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The Fix function key selects the calculator’s rounding

function and the 2 key tells the calculator how many

decimal places to round the number in the calculator

display.

10

With the 1.5594 in the calculator display press the

Fix key and the 2 key.

1.5594 rounds to 1.56

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To find the total amount of your purchase including

tax, add the total amount of the items to be purchased to the calculated tax rate.

$25.99 + 1.56 = $27.55

12

If the number displayed in the calculator is ever less than 2 decimal places in a money

amount, use the Fix function key to display the number

with 2 decimal places.

$159.9 = $159.90

13

To find sales tax:

price X tax rate = Sales Tax

$8.55 X 0.05 = $0.43

To find total cost:

price + sales tax = Total Cost

$8.55 + $0.43 = $8.98

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If the tax rate contains a decimal or a fraction, change

the tax rate to a complex fraction and then to the

equivalent decimal.

5.8 % = = 0.058 100

8.5

15

If the tax rate contains a decimal or a fraction, change

the tax rate to a complex fraction and then to the

equivalent decimal.

% = = 0.065

10021

62

16

100

5.6=