Introduction to percentages

• Mathematics
• Special Education

Introduction to percentages

Last week you learned about:

• what  a fraction is
• how to find a fraction of something
• how to simplify a fraction
• creating a fraction

To recap: Would you rather?

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

1. 1/2
2. 1/4

1/4 of £8 or 1/3 of £9?

1. 1/4 of £8
2. 1/3 of £9

3/8 of £48 or 5/9 of £45?

1. 3/8 of £48
2. 5/9 of £45

8/10 of £70 or 6/8 of £56?

1. 8/10 of £70
2. 6/8 of £56

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. 

How do you feel about percentages?

😒🙁😐🙂😃

Can you define a percentage?

Where might you use percentages?

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

Let's shade in some percentages!

Now let's play...

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

What is a common fear that many people have?

• Heights (50)
  
• Spiders (25)
  
• Public speaking (15)
  
• Flying (10)
• 100

   

keepthescore.com

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

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

keepthescore.com

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

Name something that people deliver for a living

• Newspapers (33)
  
• Mail (28)
  
• Pizza (20)
  
• Flowers (6)
  
• Packages (3)
  
• Furniture (2)
  
• Babies (2)
• 100

keepthescore.com

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

Name an animal that starts with the letter "E."

• Elephant (85)
  
• Eagle (7)
  
• Eel (3)
  
• Emu (3)
• 100

keepthescore.com

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

Name something people tend to fall out of.

• Tree (36)
  
• Love (25)
  
• Bed (21)
  
• Chair (12)
  
• Car (6)
• 100

keepthescore.com

How do you work out a percentage of an amount?

What is 50 % of £600?

1. £50
2. £300
3. 1/2
4. £60

What is 25% of 600?

1. 300
2. 150
3. 250
4. 60

What is 10 % of 200 points?

1. 2.4
2. 10
3. 200
4. 20

What is 15 % of 400?

1. 60
2. 15
3. 40
4. 200

What is 20 % of £1000?

1. £20
2. £2000
3. £200
4. £100

Now compare percentages and fractions

Example from Level 1

Post your answer here:

How do you feel about percentages now?

😒🙁😐🙂😃

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!