BELL WORKFind the percent of change and tell if it is increase or decrease:The original price for shoes were $55.00. They are now on sale for $40.00. Round to the nearest whole percent. 27% decreaseThe temperature at 5am was 32 degrees. At noon is was 44 degrees. 37.5% increase

How much tax would you pay for a coat that costs $48.50? Sales tax is 6%. What is the total cost of the coat with sales tax? $2.91 tax

$51.41 total

Graphs

Change the percent to a decimal and multiply by the total number of students. 65%

25%

10%

Favorite FoodsOf 300 Students

In a recent survey, 300 students were asked if they preferred pizza, tacos, or hamburgers.

hamburgers

pizzatacos

How many students preferred hamburgers?

65% = .65 x 300 195 students chose hamburgers

How many students preferred tacos?

• How many students preferred pizza?10% = .10 x 300

30 students prefer tacos

25% = .25 x 300

75 students voted for pizza

Reptiles 10%

Fish 15%

Dogs 45%

Cats 30%

Favorite Pets

In another recent survey, 60 students were asked which pet they preferred.

45% is how many dogs?

15% is how many fish?

30% is how many cats?

18 cats

10% is how many reptiles?

27 dogs

9 fish 6 reptiles

Change the percent to a decimal and multiply by 60.

Notice that the total number of pets equal 60

Also notice that the combined percents equal 100%

Reading Friends

Other

Family

Watching TV

How Do You Prefer to Spend Your Time?

45 people chose reading40 people chose with friends125 people chose with family143 people chose watching TV147 chose other

Finish the circle graph by filling in a percent for each category

9%

8%

25%

28.6%

29.4%

Favorite Drink People

Milk 18

Soda 8

Water 16

Juice 36

Other 2Add the people to find the total. (18 + 8 + 16 + 36 + 2)

80 people

To find the percent of people who prefer milk as their favorite drink, divide 18 by the total number of people.

18______

80 = 0.225 = 22.5%

decimal percentfraction

22.5% people prefer milk as their favorite drink.

Favorite Drink People

Milk 18

Soda 8

Water 16

Juice 36

Other 2

What is the percent of people who prefer soda?

What is the percent of people who prefer water?

2 .5 %

YOU TRY…

What is the percent of people who prefer other?

10%

20%

45%

What is the percent of people who prefer juice?

Find the angle measures of each sectionHint: There are 360o in a circle

Food: .33 x 360 =118.8o

Rent: .25 x 360 = 90o

Savings: .06 x 360 = 21.6o

Clothes: .15 x 360 = 54o

Misc. : .21 x 360 = 75.6o

Hint #2: Check your answer by making sure that they add up to 360o .

Practice:Circle Graph

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