M7 Chapter 6

6.1: Intro to precents

100

Write the decimal as a percent:

0.4

40%

200

Write the decimal as a percent:

0.07

7%

300

Write the percent as a decimal:

30%

0.3

400

Write the percent as a fraction in simplest form:

60%

3/5

500

Write the percent as a fraction in simplest form:

33.33%

1/3

Estimating with precents

100

Estimate 10% of 48

5

200

Estimate 27% of 63

16

300

Estimate 5% of 82

4

400

Estimate 34% of 93

30

500

Mr. Poling went to a restaurant and spent $43.99.  About how much should he tip if he wants to leave a 15% tip?

$6.60

Solving fraction equations

100

2/3x-9=3/4

14.625

200

3/7x+3=1/8

x=6.71

300

5/8x-10=3/4

17.2

400

1/5x+8=3/4

-36.25

500

4/5x-12=3/4

15.94

Percent of change

100

60 is decreased to 15

75%

200

12 is increased to 48

300%

300

15 is increased to 21

40%

400

72 is decreased to 64

11.1%

500

A bike shop is having a 15% off sale for a bike.  The bike usually costs $89.  Find the new price of the bike.

$75.65

Simple interest

100

Mr. Poling borrowed $100 at a 4% rate for 2 years.  What is the interest?

$32

200

Mr. Poling borrowed $200 at a 5% interest rate for 1 year.  What is the interest?

$10

300

Mr. Poling borrowed $450 for 4 years and had to pay $36 in interest.  What is the rate?

3%

400

Mr. Poling deposited $800 at a 2.5% interest rate and earned 100.  For how long was the money deposited?

5 years

500

Mr. Poling deposited some amount of money into an account with 4% interest over 3 years and earned $84 in interest.  How much was the principal?

$700