percentages

percentages

by Y Mountford

​Finding 10%

​To find 10% of an amount we divide by 10. (this moves everything 1 place to the right).

​

​

​E.g 10% of 170 = 17

​

​E.g 10% of 23 = 2.3

Multiple Choice

10% of 70

• 7

• 700

• 0.7

• 35

Multiple Choice

10% of 340

• 3400

• 3.4

• 34

• 30

Multiple Choice

10% of 5400

• 54

• 5.4

• 540

• 50

Multiple Choice

10% of 8

• 8

• 80

• 0.8

• 0.08

Multiple Choice

10% of 84

• 8.4

• 84

• 840

• 42

​Finding multiples of 10%

​Step 1: Find 10%

​Step 2: multiply the answer by how many 10%'s you need.

​

​E.g Find 30% of 70

​

​Step 1: 10% of 70 = 7

​

​Step 2: We need 3 lots of 10% to make 30%.

​ So we multiply the answer by 3

​ 7 x 3 = 21

Multiple Choice

30% of 50

• 15

• 5

• 9

• 30

Multiple Choice

40% of 80

• 24

• 32

• 45

• 30

Multiple Choice

50% of 90

• 50

• 45

• 5

• 4.5

Multiple Choice

80% of 600

• 48

• 480

• 340

• 3.4

Multiple Choice

70% of 20

• 14

• 1.4

• 21

• 2.1

Multiple Choice

90% of 90

• 81

• 72

• 18

​Finding 5%

​Step 1: find 10% of the amount.

​Step 2: Divide the answer by 2 (half it)

​

​E.g. Find 5% of 60

​

​10% of 60 =6

​Divide by 2

60/2 = 30

Multiple Choice

5% of 20

• 10

• 1

• 4

• 12

Multiple Choice

5% of 80

• 4

• 8

• 40

• 16

Multiple Choice

5% of 32

• 16

• 1.6

• 12

• 20

Multiple Choice

5% of 100

• 50

• 15

• 20

• 5

Multiple Choice

5% of 240

• 12

• 24

• 30

• 16

Multiple Choice

5% of 460

• 46

• 20

• 23

Multiple Choice

5% of 900

• 9

• 90

• 45

Multiple Choice

5% of 2000

• 100

• 10

• 200

• 40

Multiple Choice

5% of 60

• 6

• 60

• 3

• 30

Multiple Choice

5% of 420

• 42

• 30

• 21

• 4.2