# Repeated percentage change

In this lesson, we will learn about the cumulative effect of repeated percentage changes.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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

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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.If 75% of my number is 150, what is my number?

1/5

Q2.If I buy a car in a 20% off sale and it costs £30,000, how much did the car originally cost?

2/5

Q3.If I decreased the amount I paid for my car insurance by 90% to £36.50 per year, how much did I pay previously for my car insurance?

3/5

Q4.If a jumper was marked as 56% off and costs £50 now, then 44% of the original cost of the jumper is equal to £50

4/5

Q5.If I know something costs £2.10 in a 30% off sale, then i would do £2.10 = 70% and scale accordingly to get that 100% = £3 to find the original amount.

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### 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.If 75% of my number is 150, what is my number?

1/5

Q2.If I buy a car in a 20% off sale and it costs £30,000, how much did the car originally cost?

2/5

Q3.If I decreased the amount I paid for my car insurance by 90% to £36.50 per year, how much did I pay previously for my car insurance?

3/5

Q4.If a jumper was marked as 56% off and costs £50 now, then 44% of the original cost of the jumper is equal to £50

4/5

Q5.If I know something costs £2.10 in a 30% off sale, then i would do £2.10 = 70% and scale accordingly to get that 100% = £3 to find the original amount.

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.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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

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

# Repeated percentage change

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

Q1.What would the value of £300 become if it grew by 5% and then another 5%?

1/5

Q2.If an antique appreciates by 6% per year for 11 years, the decimal multiplier would be 1.06^11.

2/5

Q3.If I want to find the 'original' price of something that is currently in a sale and has 40%, I always need to find 100% of the amount to work out the original price.

3/5

Q4.If I start with a number, increase it by 30% and then decrease it by 30%, I get back to the original number.

4/5

Q5.The decimal multiplier to increase an amount by 6% for 5 years would be...

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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

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

# Repeated percentage change

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

Q1.What would the value of £300 become if it grew by 5% and then another 5%?

1/5

Q2.If an antique appreciates by 6% per year for 11 years, the decimal multiplier would be 1.06^11.

2/5

Q3.If I want to find the 'original' price of something that is currently in a sale and has 40%, I always need to find 100% of the amount to work out the original price.

3/5

Q4.If I start with a number, increase it by 30% and then decrease it by 30%, I get back to the original number.

4/5

Q5.The decimal multiplier to increase an amount by 6% for 5 years would be...

5/5

# Lesson summary: Repeated percentage change

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## Time to move!

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For 5 mins...

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