discount

```Basic
Find the total cost.
\$120 G-shock, 6% sales tax
t = percent × whole
t = .06 × 120
POD
5
Find the percent markup.
Foot Locker buys a pair of
KD VII’s for \$85. They sell
them for \$114.75. What is
the percent markup?
m = percent × whole
t = \$7.20
\$29.75 = p × 85
\$120 + \$7.20 = \$127.20
p = .35
The markup is 35%
Basic
Find the total cost.
POD
6
\$164.95 Uggs, 5.75% sales tax
t = percent × whole
t = .0575 × 164.95
Find the sales tax.
Gracie paid \$55.75 for a
manicure and pedicure. The
cost before taxes was \$52.50.
What is the percent of sales
tax?
t = percent × whole
t = \$9.48
\$3.25 = p × \$52.50
\$164.95 + \$9.48 = \$174.43
p = .0619
The sales tax is 6.2%
Discount
Discount or markdown is the amount by
which the regular price of an item is
reduced. The sale price is the regular
price minus the discount.
Example 1
A DVD normally costs \$22. This week it is
on sale for 25% off the original price.
What is the sale price of the DVD?
Method 1: Subtract the discount from the regular price
Turn 25% into a decimal
Let d = discount
d = percent × whole
d = 0.25 × 22
d = 5.50
Subtract discount from cost.
\$22-\$5.50 = \$16.50
Example 1
A DVD normally costs \$22. This week it is
on sale for 25% off the original price.
What is the sale price of the DVD?
Method 2: Subtract the percent from 100%
100% − 25% = 75%
Let s = sale price
S = 0.75 × 22
S = \$16.50
Whiteboard time
A shirt is regularly priced at \$42. It is on
sale for 15% off of the regular price. What
is the sale price of the shirt?
100% − 15% = 85%
S = 0.85 × 42
S = \$35.70
Whiteboard time
A boogie board that has a regular price of
\$69 is on sale at a 35% discount. What is
the sale price with 7% tax?
d = .35 × 69
d = 24.15
69 − 24.15 = 44.85
1.07 × 44.85 = \$47.99
Whiteboard time
A CD that has a regular price of \$15.50 is
on sale at a 25% discount. What is the sale
price with 6.5% sales tax.
d = .25 × 15.50
d = 3.88
15.50 − 3.88 = 11.62
1.065 × 11.62 = \$12.38
Whiteboard time
A cell phone is on sale for 30% off. If the
sale price is \$239.89, what is the original
price.
Remember
239.89 = 0.7 × w
÷0.7
÷0.7
\$342.70 = w
part = percent × whole
```