Applying Percents (continued)
Sales Tax and Tips (Lesson 3C)
Find the total cost to the nearest cent.- $12 haircut; 15% tip
- $48 dinner; 18% gratuity
- RESTAURANTS A restaurant bill comes to
$42.75. Find the total cost if the tax is 6%
and a 15% tip is left on the amount after
the tax is added.
EXAMPLE 8 Raymond wants to tip the
server for his dinner. If the dinner costs $24
and he wants to give the server a 15% tip,
what is the total cost?(^) decimal.15% of 24 = 0.15 × 24 Write 15% as a
= 3.60 The tip is $3.60.
$24.00 + 3.60 = $27.60 Add the tip and cost of
the dinner.
The total cost is $27.60.
Discount (Lesson 3D)
Find the sale price to the nearest cent.
- $45 roller blades; 20% discount
- $15 T-shirt; 25% discount
- ELECTRONICS A new
$30$30radio is priced at $30.
The store has an
end-of-year sale and
all their items are
40% off. What is the
sale price of the radio?EXAMPLE 9 A pair of shoes normally
costs $40. This week they are on sale for
20% off. What is the sale price of the shoes?
20% of 40 0.20 × 40 Write 20% as a decimal.
= 8.00 The discount is $8.00.
$40 - $8 = $32 Subtract the discount
from the cost.
The sale price is $32.Financial Literacy: Simple Interest (Lesson 3E)
Find the interest earned to the nearest cent
for the principal, interest rate, and time.- $475, 5%, 2 years
Find the interest paid to the nearest cent for
the loan balance, interest rate, and time.- $3,200, 8%, 4 years
- SAVINGS Aleta deposited $450 into a
savings account earning 3.75% annual
simple interest. How much interest will
she earn in 6 years?
EXAMPLE 10 Find the interest earned on
$400 at 9% for 3 years.
I = prt Simple interest formula
I = 400 · 0.09 · 3 p = $400, r = 0.09, t = 3
I = 108 Simplify.
The interest earned is $108.Lesson 3Chapter Study Guide and Review 369366_370_C06_SGR_895130.indd 369 12/30/09 4:12 PM