# Percentage change

In this lesson, we will learn about percentage change. We will investigate how to increase or decrease an amount by a given percentage.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What is 73% of 85?

1/5

Q2.What is 71.69% of 92.4?

2/5

Q3.100% of any number is simply the number itself.

3/5

Q4.What is 730.4% of 730.4?

4/5

Q5.30% of 90 is the same as 90% of 30.

5/5

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What is 73% of 85?

1/5

Q2.What is 71.69% of 92.4?

2/5

Q3.100% of any number is simply the number itself.

3/5

Q4.What is 730.4% of 730.4?

4/5

Q5.30% of 90 is the same as 90% of 30.

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Percentage change

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.If the amount of flour in a bag increased by 20%, it would always mean we add 20g on to the amount.

1/5

Q2.If I increase 200kg by 30%, then the new amount I have is...

2/5

Q3.The decimal multiplier to increase an amount by 53% would be...

3/5

Q4.It is possible to increase an amount by more than 100%

4/5

Q5.If you decreased an amount by 60%, the decimal multiplier would be 1.60.

5/5

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Percentage change

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.If the amount of flour in a bag increased by 20%, it would always mean we add 20g on to the amount.

1/5

Q2.If I increase 200kg by 30%, then the new amount I have is...

2/5

Q3.The decimal multiplier to increase an amount by 53% would be...

3/5

Q4.It is possible to increase an amount by more than 100%

4/5

Q5.If you decreased an amount by 60%, the decimal multiplier would be 1.60.

5/5

# Lesson summary: Percentage change

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga