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1. a. What is 20% of 80?

4

b. Why is four wrong?

%Is this answer correct?

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1. a. What is 20% of 80?

1600

c. Why is one thousand six hundred wrong?

%Is this answer correct?

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1. a. Find 20% of 80.

16 or 16.00

d. Why is this right?

80x .20

0016016 00%

Is this answer correct?

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2. a. What is 35% of 20?

7.35

b. Why is seven and thirty-five hundredths wrong?

%Is this answer correct?

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2. a. What is 35% of 20?

700

c. Why is seven hundred wrong?

%Is this answer correct?

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2. a. Find 35% of 20.What is 35%

of 20?

d. How can you check that seven is right?

20x .35

100607.00

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3. a. There is a discount of 25% off on a £60 pair of shoes. How much are the shoes?

£25

b. What fraction is 25% the same as?

%

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3. a. There is a discount of 25% off on a £60 pair of shoes. How much are the shoes?

£15

c. What is a quarter of £60?

%

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3. a. There is a discount of 25% off on a £60 pair of shoes. How much are the shoes?

Now provide the actual answer.

d. Why is forty-five pounds correct?

£60x .25300

120£15.00

£60- 15£45

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4. a. A shirt cost £30 plus 7% tax. What is the total cost?

£37

b. Why is thirty-seven pounds wrong?

%

Is this answer correct?

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4. a. A shirt cost £30 plus 7% tax. What is the total cost?

What is 7% of £30?

(ans. in pounds)%

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4. a. A shirt cost £30 plus 7% tax. What is the total cost?

Now answer!

d. Why is thirty-two pounds and ten pence correct?

£30x .07

£2.10

£30.00+ 2.10£32.10

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5. a. A £300 bike is on sale. How much is the cost?

£275

b. Why is two hundred seventy-five pounds wrong?

%

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5. a. A £300 bike is on sale. How much is the cost?

£75

c. Why is seventy-five pounds wrong?

%

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5. a. A £300 bike is on sale. How much is the cost?

Now answer

d. Why is two hundred twenty-five pounds correct?

£300x .25150060

£75.00

£300- 75

£225Next Slide

Remember how to

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I really understand this and I got most of them correct.

I am beginning to understand this and I got many of them correct.

I need more practice to help me understand this and I made lots of mistakes.A

B

C

LO: To use decimal fractions to calculate Next Next

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