R s aggarwal mathematics class 7 Solutions for Chapter 10 percentage

Exercises in Chapter 10 percentage Grade 7

Percentage Exercise 10A

Percentage Exercise 10B

Percentage Exercise 10C

Questions in Percentage Exercise 10A

Convert the fraction into a percentage:

(47/100)

Convert the fraction into a percentage:

(9/20)

Convert the fraction into a percentage:

(8/125)

Convert the fraction into a percentage:

(3/8)

(4/15)

Convert the fraction into a percentage:

(19/500)

Convert the fraction into a percentage:

[1(3/5)]

Convert the fraction into a percentage:

(2/3)

Convert the fraction into a percentage:

32%

Convert the fraction into a percentage

[6(1/4)] %:

Convert the fraction into a percentage:

120 %

Convert the fraction into a percentage:

[26(2/3)] %

Convert the fraction into a percentage:

6.25 %

Convert the fraction into a percentage:

0.8 %

Convert the fraction into a percentage:

0.06 %

Convert the fraction into a percentage:

22.75 %

Convert the fraction into a percentage:

7.5%

Convert the fraction into a percentage:

125%

Convert the fraction into a percentage:

43%

Convert the fraction into a percentage:

36%

Convert the fraction into a percentage:

3: 5

Convert the fraction into a percentage:

5: 4

Convert the fraction into a percentage:

16: 25

Convert the fraction into a percentage:

37: 100

Find:

0.6 % of 45

Find:

2.8 % of 35

Find:

32% of 425

Find:

[16(2/3)] % of 16

Find:

6.5 % of 400

Find:

136 % of 70

Find:

[3(1/3)] % of 90 km

Find:

20 % of ₹ 132

Find:

20 % of 12 liters

Find:

7.5 % of 600 m

Find:

8.5 % of 5 kg

Find:

25 % of ₹ 76

Questions in Percentage Exercise 10B

Rupesh secures 495 marks out of 750 in his annual examination. Find the percentage of marks

obtained by him.

The monthly salary of a typist is ₹ 15625. If he gets an increase of 12%, find his new salary.

The excise duty on a certain item has been reduced to ₹ 760 from ₹ 950. Find the reduction

percent in the excise duty on that item.

96% of the cost of a TV is ₹ 10464. What is its total cost?

70% of the student in a school are boys and the number of girls is 504. Find the number of boys in

the school.

An ore contains 12 % copper. How many kilograms of the ore required to get 69 kg of copper?

36 % of the maximum marks are required to pass a test. A student gets 123 marks and is declared

fail by 39 marks. Find the maximum marks.

A fruit-seller had some apples. He sells 40% of them and still has 420 apples. Find the number of

apples he had originally.

In an examination, 72% of the total examinees passed. If the number of failures is 392, find

the total number of examinees.

After deducting a commission of 5%, a moped costs ₹ 15200. What is its gross value?

Gunpowder contains 75% of niter and 10% of sulfur, and the rest of it is charcoal. Find the

amount of charcoal in 8 kg of gunpowder.

Chalk contains 3% of carbon, 10% of calcium, and 12% of oxygen. Find the amount in grams of

each of these substances in 1 kg of chalk.

Sonal went to school for 219 days in a full year. If her attendance is 75%, find the number of days on

which the school was open.

Questions in Percentage Exercise 10C

(3/4) as rate percent is

(a) 7.5% (b) 75% (c) 0.75% (d) none of these

The ratio 2: 5 as rate percent is

(a) 4% (b) 0.4% (c) 40% (d) 14%

[8(1/3)] % expressed as e fraction, is

(a) (25/3) (b) (3/5) (c) (1/12) (d) (1/4)

If x% of 75 = 9, then the value of x is

(a) 16 (b) 14 (c) 12 (d) 8

What percent of (2/7) is (1/35)?

(a) 25% (b) 20% (c) 15% (d) 10%

What percent of 1 day are 36 minutes?

(a) 25% (b) 2.5% (c) 3.6% (d) 0.25%

A number increased by 20% gives 42. The number is

(a) 35 (b) 28 (c) 36 (d) 30

A number decreased by 8% gives 69. The number is

(a) 80 (b) 75 (c) 85 (d) None of these

An ore contains 5% copper. How much ore is required to obtain 400 g of copper?

(a) 2 kg (b) 4 kg (c) 6 kg (d) 8 kg

After deducting a commission of 10% a TV costs ₹ 18000. What is its gross value?

(a) ₹ 18800 (b) ₹ 20000 (c) ₹ 19800 (d) none of these

On increasing the salary of a man by 25%, it becomes ₹ 20000. What was his original salary?

(a) ₹ 15000 (b) ₹ 16000 (c) ₹ 18000 (d) ₹ 25000

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Chapters in this book

Integers

Fractions

Decimals

Rational Numbers

Exponents

Algebraic Expressions

Linear Equations in one variable

Ratio and Proportion

Unitary Method

Percentage

Profit and Loss

Simple Interest

Lines and Angles

Properties of Parallel Line

Properties of Triangles

Congruence

Constructions

Reflection and Rotational Symmetry

Three-Dimensional Shapes

Mensuration

Collection and Organisation of Data (Mean, Median, Mode)

Bar Graphs

Probability