Read & Do: Percents

READ 

Read:

Percent (%) means a part of 100.

A percent (%) represents how much of the total is used.

Look at the picture below.

Image Links to an external site. by projectidea, CC BY 2.0 Links to an external site.

There are 100 people in the picture.   Each person represents 1%

If 5 of the people in the picture use gestures when they talk, they would be 5% out of the 100 people.

If 17 of the people in the picture interrupt sometimes, they would be 17% out of the 100.

Image Links to an external site. by seriousbri, CC BY 2.0 Links to an external site.

Read

Sometimes the total is not 100.  The total can be any number.

Example

I have 24 cookies, so 24 is my total and equals (=) 100%.  If you eat 12 of my cookies, I only have 12 remaining.

12 = 50%

I have 10 students, so 10 = 100%.  If 2 of the students are not in class, I only have 8 students remaining.

8 = 80%.

Read:

How can you find the percent?  Read these two (2) examples.

Example 1:

I did a survey with 10 students.  I asked 10 students the questions, so 10 is my total.

3 students gave me the same answer to question #1.

What percent is 3 students out of the 10 total students?

I need to multiple 3 by 100.  Then, I divide that number by the total students.

3 x 100 = 300

300 / 10 (total students) = 30%

Example 2:

I did a survey with 200 students.  I asked 200 students, so 200 is my total.  

30 students gave the same answer to question #3.

What percent is 30 out of the total 200 students?

I need to multiply 30 by 100.  Then, I divide that number by the total students.

30 x 100 = 3000

3000 / 200 (total students) = 15%

Now you try it.  Read the information below and answer the question.  You may need to use a calculator.  You can use the one on your computer, on your phone, or at your house.  Submit your answer in the assignment page.

DO

Read:

Read the situation.  Do the math to find the percent of students with the same answer.

Sally did a survey of her class.   There are 20 people in her class. 20 is the total number of students.  She asked each student the same question:  "How many hours do you study English each day?": A- 1 hour or B- 2 hours

8 people answered A

12 people answered B

What percent of the students answered A?

HOW TO SUBMIT ONLINE

Read:

Open the "How to Submit a Text Entry" handout to read about how to submit your assignment.

HOW TO SUBMIT A TEXT ENTRY Links to an external site.