Percentage of the whole

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Slide 1: Slide

WiskundeMiddelbare schoolvwoLeerjaar 1

This lesson contains 17 slides, with interactive quizzes and text slides.

Lesson duration is: 50 min

Items in this lesson

Percentage of the whole

Slide 1 - Slide

During the promotion week at Sportshop "Fairplay," you get a 17.5% discount on all items. Zhara buys the items in the photo, where you can see the prices before the promotion week. How much would Zhara have to pay during the promotion week?

Slide 2 - Slide

during the promotion week, Zhara has to pay €54,39.

Slide 3 - Slide

during the promotion week, Zhara has to pay €54,39.

Slide 4 - Slide

Planning

-Review last lessons

-Learning objectives

- Explanation of new theory

-Practice

Slide 5 - Slide

Percentage

a percentage represents a fraction out of 100.

Percentages can also be represented in decimal or fraction form

Slide 6 - Slide

Calculate 40% of 78

Slide 7 - Open question

Percentage of the whole

Example:

If 17 out of 53 students like soccer, what percentage is that?

Slide 8 - Slide

Percentage of the whole

Example:

If 17 out of 53 students like soccer, what percentage is that?

p e r c e n t a g e = \frac{​ ( p a r t ) ​ ​}{​ w h o l e ​} \cdot 100

Slide 9 - Slide

Percentage of the whole

Example:

If 17 out of 53 students like soccer, what percentage is that?

p e r c e n t a g e = \frac{​ ( p a r t ) ​ ​}{​ w h o l e ​} \cdot 100

p e r c e n t a g e = \frac{​ 1 7 ​ ​}{​ 5 3 ​} \cdot 100

Slide 10 - Slide

Percentage of the whole

Example:

If 17 out of 53 students like soccer, what percentage is that?

p e r c e n t a g e = \frac{​ ( p a r t ) ​ ​}{​ w h o l e ​} \cdot 100

p e r c e n t a g e = \frac{​ 1 7 ​ ​}{​ 5 3 ​} \cdot 100 = 32, 1

Slide 11 - Slide

Challenge:

If 40 out of 125 students prefer online learning, what percentage is that?

Slide 12 - Slide

Challenge:

If 40 out of 125 students prefer online learning, what percentage is that?

p e r c e n t a g e = \frac{​ 1 7 ​ ​}{​ 1 2 5 ​} \cdot 100 = 13, 6

Slide 13 - Slide

Example:

If 40 out of 125 students prefer online learning, what percentage is that?

p e r c e n t a g e = \frac{​ 1 7 ​ ​}{​ 1 2 5 ​} \cdot 100 = 13, 6

13,6% of the students prefer online learning

Slide 14 - Slide

Find 28 out of 82 as a percentage

Slide 15 - Open question

Find 183 out of 185 as a percentage

Slide 16 - Open question

what is the difference between percentage of and percentage off?

Try Yourself!

Teams: Worsheet "Determine Percentage"

Slide 17 - Slide

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Percentage of the whole

Items in this lesson

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Slide 3 - Slide

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Slide 6 - Slide

Slide 7 - Open question

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Slide 15 - Open question

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