Application of Percents

C = % ⋅ P

commission: $78

commission rate: 6.5%

• $5.11

• $120.85

• $1200

I = prt
interest: ______
principal: $3000
rate: 4.5% 
time: 2 years 

• $270

• $135

• $3000

Multi-Step Problem:
A TV is regularly priced at $600, but it is marked down 20% off.  What is the new price including a 10% sales tax?

• $490

• $518

• $528

I = prt
Emilio invested money in an account that earns 5% simple interest.  He earned $546 in interest 2 years later.  How much did he invest? 

• $546

• $54.60

• $5460

Johnny takes his family to dinner and their bill is $110. He wants to leave a 20% tip. After the 7% tax, what was the total amount he paid?

• $123.20

• $98.50

• $141.24

Original amount:  80
New amount: ______
20% decrease 

• 64

• 96

• 80

Original amount:  _____
New amount: 24
80% decrease 

• 120

• 43.20

• 48

Original amount:  65
New amount: _____
25% increase 

• 81.25

• 16.25

• 48.75

Sofa:  $599.99
20% discount 
Sales tax: 6%
How much will the sofa cost?

• $508.79

• $479.99

• $635.99

I = Prt

Principle = $350.

Interest rate = 2.5%

TIme = 3 years.

How much interest?

• $7.50

• $26.25

• $87.5

• $262.50