Percentage increase and decrease

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Slide 1: Slide

This lesson contains 16 slides, with interactive quiz and text slides.

Items in this lesson

Slide 1 - Slide

Slide 2 - Slide

a. 0,2 x 525 = 105

You will pay 105 euro more per week

b. 525 + 105 = 630

In the high season you will pay 630 euro per week

Slide 3 - Slide

Slide 4 - Slide

Slide 5 - Slide

old price

increase

new price

Slide 6 - Slide

old price

increase

new price

Slide 7 - Slide

Slide 8 - Slide

1.031 x 223 = 229,913

A year later there are 230 pupils in the second grade

Slide 9 - Slide

Percentage increase

1. Add the percentage we are increasing by to 100%

(We add it on to 100% because we are increasing the original value.)

2. Convert to a decimal

3. Multiply the original amount by the decimal

Slide 10 - Slide

Slide 11 - Slide

Slide 12 - Slide

old price

Decrease

new price

Slide 13 - Slide

old price

Decrease

new price

Slide 14 - Slide

Percentage decrease

1. Subtract the percentage we are decreasing by from 100%

(We subtract it from 100% because we are decreasing the value and 100% represents the original value)

2. Convert to a decimal

3. Multiply the original amount by the decimal

Slide 15 - Slide

Daniel has £3600. He spends 27.5% of his money. How much does he have left?

Slide 16 - Open question

Percentage increase and decrease

Items in this lesson

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Slide 2 - Slide

Slide 3 - Slide

Slide 4 - Slide

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Slide 16 - Open question

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