Increasing and decreasing percentages

Increasing and decreasing percentages

Increase in percentage

As well as getting taking percentages away, you might also have to add percentages.

The original pack had 80 teabags

What is 50% of 80?

Add them together...

New tip when increasing or decreasing percentages.

Multiple Choice

What is 20% of 50?

• 70

• 30

• 20

• 10

Multiple Choice

A pair of shoes cost £50.00. In a sale there is 20% off. What is the new price?

• £40.00

• £60.00

• £20.00

• £30.00

Decreasing

We can use the '-' sign when we are decreasing.

eg. decrease 50 by 20%

using your calculator, type:

50 - 20%

Multiple Choice

Decrease 40 by 10%

• 38

• 4

• 36

• 44

Multiple Choice

Decrease £45.00 by 30%

• £42.00

• £31.50

• £13.50

• £58.50

Multiple Choice

Decrease 250g by 90%

• 225g

• 25g

• 277g

• 475g

Multiple Choice

Decrease £14 by 5%

• £0.70

• £1.40

• £14.70

• £13.30

Multiple Choice

Decrease 56 by 22%

• 12.32

• 43.68

• 68.32

• 25

Increasing

We can use the '+' sign when we are decreasing.

eg. increase 50 by 20%

using your calculator, type:

50 + 20%

Multiple Choice

Increase 88 by 30%

• 114.4

• 58

• 118

• 26.4

Multiple Choice

Increase £36 by 20%

• £28.80

• £7.20

• £43.20

• £36.20

Multiple Choice

Increase 300g by 50%

• 150g

• 350g

• 250g

• 450g

Multiple Choice

Increase £6000 by 1.5%

• £6090

• £5910

• £90.00

• £6150

Multiple Choice

Increase 1400 by 11%

• 1389

• 1411

• 1386

• 1554