Percentages, Fractions and Decimals

Question 1

Lucy got 87% in her french test, what is this in decimal?

Answer 1

0.87

Question 2

65% of Lucy’s class passed the French test. What fraction is this?

Answer 2

13/20

Question 3

Write 142% as mixed number

Answer 3

1 21/50

Question 4

What is 33 1/3 % in decimal

Answer 4

0.3

Question 5

1 in percentage

Answer 5

100%

Question 6

10 in percentage

Answer 6

1000%

Question 7

0.1 in percentage

Answer 7

10%

Question 8

How do you convert 0.86 into percentage?

Answer 8

Multiply by 100%, 0.86 * 100% = 86%

Question 9

8 out of 11 in percentage

Answer 9

73%

Question 10

10% of 50

Answer 10

Divide by 10, 50/10 = 5

Question 11

5% 0f 8

Answer 11

Divide by 10 and then halve it, 8/10=0.8, 08/2 = 0.4

Question 12

25% of 160cm

Answer 12

Divide by 4, 25% = 25 / 100 = 1 / 4

160 / 4 = 40 cm

Question 13

11% of 5600

Answer 13

11% = 10% + 1%
10% of 5600 = 560
1% of 5600 = 56
11% of 5600 = 560 + 56 = 616

Question 14

iPhone costs 300 dollars. If a store keeper wants to make 20% profit how much he should sell?

Answer 14

Original cost = 300
20% profit = 0.2 * 300 = 60
Selling price = 360

Question 15

How do you calculate an increase of X%?

Answer 15

To find increase of X% find 100+X %

Selling for profit means increasing the price

Question 16

How do you calculate an decrease of X%?

Answer 16

To find decrease of X% we can find 100 - X %

Selling for loss means decreasing the price

Question 17

Venkat bought a laptop for 50000 and sold it for 10% loss, How much money he got from the sale?

Answer 17

Approach-1:

Cost = 50000
Loss = 0.1 * 50000 = 5000
Selling price = 50000 - 5000 = 45000

Approach-2:

Selling price = 50000 * (100 - 10) % = 50000 * 0.9 = 45000