Percentages

Percentages

Multiple Choice

What is 50% of 24?

• 20

• 10

• 12

What is 50% of 24?

24 ÷ 2 = 12

So 50% of 24 is 12

Multiple Choice

What is 50% of 80?

• 20

• 40

• 50

• 60

What os 50% of 80?

80 ÷ 2 = 40

So 50% of 80 is 40

How to find 25% of the number?

1) Divide the number by 4 eg.

Find 25 % of 80

80÷4=20

2) Half the number (divide by 2) and half the number (divide by 2) again)

25% 0f 80

80 ÷2=40

40÷2=20

Multiple Choice

Find 25% of 60

• 10

• 20

• 15

• 25

Find 25 % of 60

1) 60 ÷ 4 = 15

2) 60 ÷ 2 = 30

30÷2=15

25% of 60 is 15

Multiple Choice

Find 25% of 120

• 60

• 30

• 40

Find 25% of 120

1) 120 ÷ 4 = 30

2) 120 ÷ 2 = 60

60 ÷ 2 = 30

So 25% of 120 = 30

How to find 10% of the number?

Divide the number by 10

eg. 10% of 125

125÷ 10 = 12.5

Multiple Choice

What is 10% of 415?

• 4.15

• 41.5

• 41

What is 10% of 415?

415 ÷ 10 = 41.5

Multiple Choice

What is 10% of 801?

• 80.1

• 8.01

• 8.1

What is 10% of 801?

801 ÷ 10 = 80.1

How to find 75% of 60?

1) We know that 50% +25% = 75%

- 50% of 60 is

60÷2=30

-25% od 60 is

60÷4=15

2) Add 50% and 25%:

30 + 15 = 45

Therefore 75% of 50 is 45

Multiple Choice

Find 75% of 120

• 60

• 30

• 90

• 100

What is 75% of 120?

1) find 50%

120÷2 = 60

2) find 25% of 120

120÷4=30

3) Add 50%+25%=75%

so

60+30=90

therefore 75% of 120 = 90

How to find 30% of 90?

1) Find 10% of 90

90÷10=9

2) 3 lots of 10 is 30

so 3 x 10%=30%

Therefore:

3 x 9 = 27

30% of 90 is 27

Multiple Choice

What is 30% of 40?

• 8

• 12

• 16

• 12

What is 30% of 40?

1) find 10%

40÷10=4

2) 3 x 10% = 30%

Therefore 3 x 4 = 12

30% of 40 = 12

How to find 5% of 80?

1) find 10%

80÷10=8

2) 10% ÷ 2 = 5%

so divide (half) your answer

8÷2=4

Therefore 5% of 80 is 4

Multiple Choice

Find 5% od 120

• 12

• 8

• 6

• none of these answers

Find 5% of 120

1) find 10%

120÷10=12

2) find 5%

10%÷2=5%

so 12÷2 = 6

5% of 120 = 6

Multiple Choice

What is 15% of 40?

• 8

• 4

• 2

• 6

What is 15% of 40?

1) find 10%

40÷10= 4

2) find 5%

10%÷2=5%

so 4÷2=2

3) add 10% and 5%

4+2=6

Therefore 15% of 40 is 6