Just in case is not clear the equation is:

1
28.
29.
Just in case is not clear the equation
is Solve for l
2
2
32.
33.

3
Home-Learning Review
4
Quiz 3a
Convert the given amount to the given unit

• 200 cm ______ meters?
• 5 ft 3 in _________ in?

Solve each proportion
3.
5.
32
y
36
4.
45
5
Quiz 3b
Hint lb pound oz ounces
Convert the given amount to the given unit

• 6 ½ ft ______ in?
• 4 lb 7 oz _________ oz?

Solve each proportion
3.
5.
32
y
36
4.
45
6
Name Date Period
Topic Percent and Change Expressed as a
percent Essential Question What strategies could
help you solve a percent problem or a percent
change?
Vocabulary
Percentage
A percentage is a fraction in which the
denominator is equal to 100.
Fractions to percentage
Decimals to percentage
.58
.08
YOUR TURN
Quick Review
.04
.6
7
a part of, b base, p percent
 
a p b
What percentage of 56 is 42?
How do you find the percent using the
percent proportion?
What percentage of 75 is 15?
A dress shirt that normally costs 38.50 is on
sale for 30 off. What is the sale price of the
shirt?
How do you find the a part using the
percent equation?
A family sells a car to dealership for 60 less
than they paid for it. They paid 9000 for the
car. For what price did they sell the car?
How do you find the b part using the
percent equation?
125 of what number is 17. 5?
20 of what number is 80?
8
YOUR TURN
1) What percentage of 16 is 10?
2) What percentage of 48 is 20?
a part of
b base
3) As you walk into a store you see the skate
board you always wanted at a 35 discount from
its original price of 39.99. What is the sale
price of the skateboard?
p percent
4) 60 of what number is 13.5?
a p b
5) 150 of what number is 34?
If you need help do not hesitate to ask for help!
9
How do you find simple interest?
You deposited 840 in a savings account that
earns a simple interest rate of 4.5 per year.
You want to keep the money in the account for 4
years. How much interest will you earn?
You deposited 125 in a savings account that
earns a simple interest rate of 1.75 per year.
You earned a total of 8.75 in interest. For
how long was your money in the account?
I Prt
I interest
P principal
YOUR TURN
r annual interest rate
6) A savings account earns simple interest at a
rate of 6 per year. Last year the account earned
10.86 in interest. What was the balance in the
account at the beginning of last year?
t time in years
10
Percentage Change
Vocabulary

 is the ratio of the amount of change to the
original amount .
Example
Peters weight decreases from 60 kg to 48 kg.
Find the percentage change of his weight.
11
YOUR TURN
7) In one year, the toll for passenger cars to
use a tunnel rose from 3 to 3.50. What was the
percent increase?
8) The average monthly precipitation for Chicago,
Illinois, peaks in June at 4.1 in. The average
monthly precipitation in December is 2.8 in.
What is the percent decrease from June to
December?
12
Real Life Profit and Loss
9) David bought a car for 90,000 three years
ago. He sells the car for 54,000 this year. What
is the percentage change of his cars price?
Still Your Turn!
13
Real Life Percent Error
10) A decorator estimates that a rectangular rug
is 5ft by 8ft. The rug is actually 4ft by 8ft.
What is the percent error in the estimated area?
A) 0.25 B) 20 C) 25 D) 80
Yeah, You Know It. Its Your Turn!
14
Independent Practice
Page 137 Solve It Getting Ready Page 148 (8,
16, 17, 18) Page 149 (28, 39) Page 150 (42)
15
Pair Work Presentations
Group 1
Group 6
103ft yd
30 meters cm
12 lb 3 oz oz
Group 2
Group 7
If 5 pizzas serve 14 people, how many pizzas are
needed for a pizza party with 76 people?

• 15 of what number is 74?

• What is 30 of 241

Group 8
A beauty salon buys bottles of styling gel for
6. 35 per bottle and marks up the price by 35.
For what price does the salon sell each bottle?
Group 3
You are planting a vegetable garden with 12 rows.
If it took 26 minutes to plant the first 4 rows,
how long will it take to plant all 12 rows of the
garden?
Group 4
Group 9
You deposit 645 in a savings account that earns
simple interest at a rate of 3.5 per year. How
much interest will you have earned after 7 years?
270 min hours
5000 centimeters meters
43 km cm
Group 5
Find the percent change A 1700 computer is on
sale for 1175.
Group 10
Find the percent change The value of a stamp
collection increases from 150 to 170 in one year
16
Wrap-Up Vocabulary Review Test
Reminder HLA9Conversions, Proportions,
Percents Page 155-156 (40, 46, 49, 54, 60)