Percentage of a quantity

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

Good afternoon!

Schedule: 

• Learning goals 
• Last time
• Percentage of a quantity
• Work in duo's 
• Level worksheets

Learning goals 

At the end of this lessons I can:

• Calculate the percentage of a quantity 
• Work together to find the answer to a problem

What did we do last time?

Give the percentage of people in this class that play an instrument.

Percentage of a quantity 

In a basket of 40 apples 5% of them are rotten

How many apples are rotten? 

Convert to fraction

Convert to decimal

Percentage of a quantity 

In a basket of 40 apples 5% of them are rotten

How many apples are rotten? 

Calculate an easy percentage first

Calculate 1% first

In another basket there are 25 apples and 24% of them are rotten
How many apples are rotten?

Which class has the most non-binary students? 

Class A	50
Class B	30

Total amount of students

- In class A, 10% of all students is non-binary

- In class B,         % of all students is non-binary 

13​3​​1​​

Which class has the most non-binary students? 

Which class has the most non-binary students? 

Class A	50
Class B	30

Total amount of students

- In class A, 10% of all students is non-binary

- In class B,         % of all students is non-binary 

13​3​​1​​

Which class has the most non-binary students? 

Level worksheets

On ManageBac in Files: Unit 2:

You will find

-  "Percentage of a quantity worksheet lvl 1 "

- "Percentage of a quantity worksheet lvl 2"

- "Percentage of a quantity worksheet lvl 3 "

Choose a level to work on for the next 10-15 min 

Homework

Create your own (holiday themed) percentage problem.

- the more complex your context and problem is, the better

- provide the correct answer + working out for your problem as well

- I will choose problems for tomorrows lesson