One quantity as a percentage of another

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

Good morning!

Schedule: 

• Learning goals 
•  One quantity as a percentage of another
• Create your own question 
• Work 

Learning goals 

At the end of this lesson I can:

• Write one quantity as a percentage of another 
• Create a percentage problem myself

What is your age?

10

11

12

13

14

15

One quantity as a percentage of another

What percentage of the class is 12 years old? 

What percentage of the class is 11 years old? 

One quantity as a percentage of another 

"Express 24 minutes as a percentage of 1 hour"

1. We can only compare like with like (same unit)

2.  Write as a fraction

3.  Multiply by 100%

4.  Simplify 

Express 12 students as a percentage of 40 students

51.7 % 

72.9 %

21.5 % 

0.9 % 

2.6 % 

36.8 % 

Your own question!

With your neighbour: 

- Come up with a real-life question where you need to represent one quantity as a percentage of another

(ex. Express 56 marks as a percentage of 80 marks)

- Make sure you work out your problem as well. 

Criterion D

Work

p. 185              9D:  1acegik, 2bdfhj, 3, 4, 5