Introduction to percentages

Introduction to percentages
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Slide 1: Tekstslide
MathematicsSpecial Education

In deze les zitten 43 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 90 min

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Introduction to percentages

Slide 1 - Tekstslide

Last week you learned about:
  • what  a fraction is
  • how to find a fraction of something
  • how to simplify a fraction
  • creating a fraction

Slide 2 - Tekstslide

To recap: Would you rather?

Slide 3 - Tekstslide

1/2 a pizza or 1/4 of a pizza?
A
1/2
B
1/4

Slide 4 - Quizvraag

1/4 of £8 or 1/3 of £9?
A
1/4 of £8
B
1/3 of £9

Slide 5 - Quizvraag

3/8 of £48 or 5/9 of £45?
A
3/8 of £48
B
5/9 of £45

Slide 6 - Quizvraag

8/10 of £70 or 6/8 of £56?
A
8/10 of £70
B
6/8 of £56

Slide 7 - Quizvraag

Learning outcomes:
  • ILO 1: Define what a percentage is and list times that you might use them. 
  • ILO 2: Draw a percentage and convert it into a fraction.
  • ILO 3: Understand the relationship between fractions and percentages and be able to convert everyday percentages to fraction 
  • ILO 4 : Calculate a percentage  and be able to solve a problem involving percentages using their chosen method. 


Slide 8 - Tekstslide

How do you feel about percentages?
😒🙁😐🙂😃

Slide 9 - Poll

Can you define a percentage?

Slide 10 - Open vraag

Where might you use percentages?

Slide 11 - Open vraag

So what is a percentage?

  • percent means out of 100
  • so a percentage is a fraction which is out of 100
  •  denoted by the % sign
  • so 38% is 38/100

Slide 12 - Tekstslide

Let's shade in some percentages!

Slide 13 - Tekstslide

Now let's play...

Slide 14 - Tekstslide

Of the 100 people surveyed, what is a common fear that many people have?
(Source: https://www.buzzfeed.com/kellyrissman/family-feud-questions)

Slide 15 - Open vraag

What is a common fear that many people have?
  • Heights (50)
  • Spiders (25)
  • Public speaking (15)
  • Flying (10)
  • 100
   



Slide 16 - Tekstslide

Slide 17 - Link

Of the 100 people surveyed, name something that they would do in front of a mirror.

Slide 18 - Open vraag

Name something you'd do in front of a mirror.

  • Brush teeth (26)
  • Brush hair (23)
  • Pop a pimple/zit (19)
  • Check your outfit (17)
  • Practice dance moves (15)
  • 100




Slide 19 - Tekstslide

Slide 20 - Link

Of the 100 people surveyed, name something that people deliver for a living

Slide 21 - Open vraag

Name something that people deliver for a living
  • Newspapers (33)
  • Mail (28)
  • Pizza (20)
  • Flowers (6)
  • Packages (3)
  • Furniture (2)
  • Babies (2)
  • 100






Slide 22 - Tekstslide

Slide 23 - Link

Of the 100 people surveyed, what animal did they name that started with an e?

Slide 24 - Open vraag

Name an animal that starts with the letter "E."
  • Elephant (85)
  • Eagle (7)
  • Eel (3)
  • Emu (3)
  • 100



Slide 25 - Tekstslide

Slide 26 - Link

Of the 100 people surveyed, what did they name as something you might fall out of?

Slide 27 - Open vraag

Name something people tend to fall out of.
  • Tree (36)
  • Love (25)
  • Bed (21)
  • Chair (12)
  • Car (6)
  • 100




Slide 28 - Tekstslide

Slide 29 - Link

How do you work out a percentage of an amount?

Slide 30 - Open vraag

What is 50 % of £600?
A
£50
B
£300
C
1/2
D
£60

Slide 31 - Quizvraag

What is 25% of 600?
A
300
B
150
C
250
D
60

Slide 32 - Quizvraag

What is 10 % of 200 points?
A
2.4
B
10
C
200
D
20

Slide 33 - Quizvraag

What is 15 % of 400?
A
60
B
15
C
40
D
200

Slide 34 - Quizvraag

What is 20 % of £1000?
A
£20
B
£2000
C
£200
D
£100

Slide 35 - Quizvraag

Slide 36 - Tekstslide

Now compare percentages and fractions
timer
5:00

Slide 37 - Tekstslide

Example from Level 1

Slide 38 - Tekstslide

Slide 39 - Tekstslide

Post your answer here:

Slide 40 - Open vraag

How do you feel about percentages now?
😒🙁😐🙂😃

Slide 41 - Poll


Slide 42 - Open vraag

What would you like more practice of?
Finding a percentage of something
Converting percentages to fractions or decimals
Problem solving with percentages
Extension: increase or decrease with percentages
Nothing - I am happy to move on
All of it!

Slide 43 - Poll