Repeated percentage change

In this lesson, you will learn about the cumulative effect of percentages.

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.

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 a 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.

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 a 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

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Worksheet

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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.

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.

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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