Rs Aggarwal 2019 2020 Solutions for Class 8 Maths Chapter 9 Percentage are provided here with simple step-by-step explanations. These solutions for Percentage are extremely popular among Class 8 students for Maths Percentage Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Rs Aggarwal 2019 2020 Book of Class 8 Maths Chapter 9 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Rs Aggarwal 2019 2020 Solutions. All Rs Aggarwal 2019 2020 Solutions for class Class 8 Maths are prepared by experts and are 100% accurate.

Question 1:

Express each of the following as a fraction:
(i) 48%
(ii) 220%
(iii) 2.5%

Question 2:

Express each of the following as a decimal:
(i) 6%
(ii) 72%
(iii) 125%

Question 3:

Express each of the following as a percentage:
(i) $\frac{9}{25}$
(ii) $\frac{3}{125}$
(iii) $\frac{12}{5}$

Question 4:

Convert the ratio 4 : 5 to percentage.

Question 5:

Express 125% as a ratio.

Question 6:

Which is largest in $6\frac{2}{3}%,\frac{3}{20}$ and 0.14?

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Question 7:

(i) What per cent of 150 is 96?
(ii) What per cent of 5 kg is 200 g?
(iii) What per cent of 2 litres is 250 mL?

Question 8:

Find $4\frac{1}{2}%$ of Rs 3600.

Question 9:

If 16% of a number is 72, find the number.

Question 10:

A man saves 18% of his monthly income. If he saves Rs 3780 per month, what is his monthly income?

Question 11:

A football team wins 7 games, which is 35% of the total games played. How many games were played in all?

$=\left(x×\frac{35}{100}\right)\phantom{\rule{0ex}{0ex}}=\frac{35x}{100}$

Question 12:

Amit was given an increment of 20% on his salary. If his new salary is Rs 30600, what was his salary before the increment?

Question 13:

Sonal attended her school on 204 days in a full year. If her attendance is 85%, find the number of days on which the school was opened.

$=\left(\mathrm{x}×\frac{85}{100}\right)\phantom{\rule{0ex}{0ex}}=\frac{85\mathrm{x}}{100}$

Question 14:

A's income is 20% less than that of B. By what per cent is B's income more than A's?

$=Rs125$

Question 15:

The price of petrol goes up by 10%. By how much per cent must a motorist reduce the consumption of petrol so that the expenditure on it remains unchanged?

$=\frac{1}{11}\mathrm{unit}$
$=9\frac{1}{11}%$

Question 16:

The population of a town increases by 8% annually. If the present population is 54000, what was it a year ago?

$=\left(x×\frac{108}{100}\right)\phantom{\rule{0ex}{0ex}}=\frac{27x}{25}$

Question 17:

The value of a machine depreciates every year by 20%. If the present value of the machine be Rs 160000, what was its value last year?

$=\mathrm{Rs}\left(\mathrm{x}×\frac{80}{100}\right)\phantom{\rule{0ex}{0ex}}=\mathrm{Rs}\frac{4\mathrm{x}}{5}$

Question 18:

An alloy contains 40% copper, 32% nickel and rest zinc. Find the mass of zinc in one kg of the alloy.

$=28%$

Question 19:

Balanced diet should contain 12% of proteins, 25% of fats and 63% of carbohydrates. If a child needs 2600 calories in his food daily, find in calories the amount of each of these in his daily food intake.

Question 20:

Gunpowder contains 75% nitre and 10% sulphur. Find the amount of gunpowder which carries 9 kg nitre. What amount of gunpowder would contain 2.5 kg sulphur?

Question 21:

Divide Rs 7000 among A, B and C such that A gets 50% of what B gets and B gets 50% of what C gets.

Question 22:

Find the percentage of pure gold in 22-carat gold, if 24-carat gold is 100% pure.

$=91\frac{2}{3}%$

Question 23:

The salary of an officer is increased by 25%. By what per cent should the new salary be decreased to restore the original salary?

Let the original salary be Rs 100
Then, after increment of 25% the salary becomes
=

To restore the original salary, let the new salary be decreased by x%.
Thus, we get

Therefore, the new salary must be reduced by 20% to restore the original salary.

Question 1:

$\frac{3}{5}=?$
(a) 30%
(b) 40%
(c) 45%
(d) 60%

(d) 60%

Question 2:

0.8% when expressed as a decimal, is
(a) 0.08
(b) 0.008
(c) 8
(d) 0.8

(b) 0.008

Question 3:

6 : 5 when expressed as a percentage, is
(a) $83\frac{1}{3}%$
(b) 90%
(c) 120%
(d) 6.5%

(c) 120%

Question 4:

5% of a number is 9. The number is
(a) 45
(b) 90
(c) 135
(d) 180

(d) 180

Question 5:

What per cent of 92 is 120?
(a) 75%
(b) $33\frac{1}{3}%$
(c) $133\frac{1}{3}%$
(d) none of these

(c) $133\frac{1}{3}%$

Question 6:

What per cent of 10 kg is 250 g?
(a) 25%
(b) 5%
(c) 10%
(d) 2.5%

(d) 2.5%

40% of ? = 240
(a) 60
(b) 600
(c) 6000
(d) 960

(b) 600

?% of 400 = 60
(a) 6
(b) 12
(c) 15
(d) 20

(c) 15

Question 9:

(180% of ?) ÷ 2 = 504
(a) 400
(b) 480
(c) 600
(d) 560

(d) 560

Question 10:

20% of Rs 800 = ?
(a) Rs 160
(b) Rs 16
(c) Rs 1600
(d) none of these

(a) Rs 160

Question 11:

In an examination, Nitin gets 98 marks. This amounts to 56% of the maximum marks. What are the maximum marks?
(a) 75
(b) 150
(c) 175
(d) 225

(c) 175

$=\frac{56x}{100}$

Question 12:

A number is first increased by 10% and then reduced by 10%. The number
(a) does not change
(b) decrease by 1 %
(c) increases by 1 %
(d) none of these

(b) decrease by 1 %

Question 13:

A period of 4 hours 30 min is what per cent of a day?
(a) $18\frac{3}{4}%$
(b) 20%
(c) $16\frac{2}{3}%$
(d) 19%

(a) $18\frac{3}{4}%$

Question 14:

In an examination, 65% of the total examinees passed. If the number of failures is 420, the total number of examinees is
(a) 500
(b) 1000
(c) 1200
(d) 1625

(c) 1200

$=\left(x×\frac{35}{100}\right)\phantom{\rule{0ex}{0ex}}=\frac{35x}{100}$

Question 15:

A number exceeds 20% of itself by 40. The number is
(a) 50
(b) 60
(c) 80
(d) 320

(a) 50

Question 16:

A number decreased by $27\frac{1}{2}%$ gives 87. The number is
(a) 58
(b) 110
(c) 120
(d) 135

(c) 120

Question 17:

0.05 is what per cent of 20?
(a) 25%
(b) 2.5%
(c) 0.25%
(d) 0.025%

(c) 0.25%

Question 18:

One-third of 1206 is what per cent of 134?
(a) 3%
(b) 30%
(c) 20%
(d) 300%

(d) 300%

Question 19:

x% of y is y% of?
(a) x
(b) 100x
(c) $\frac{x}{100}$
(d) $\frac{y}{100}$

(a) x

What per cent of
(a) 2.5%
(b) 10%
(c) 20%
(d) 25%

(a) x

Question 1:

Express:
(i) 24% as a fraction;
(ii) 105% as a decimal;
(iii) 4 : 5 as a percentage;
(iv) 56% as a ratio.

Question 2:

If 34% of a number is 85, find the number.

Question 3:

The value of a machine depreciates every year by 10%. If the present value of the machine is Rs 54000, what was its value last year?

Question 4:

An alloy contains 30% copper, 42% nickel and rest zinc. Find the mass of zinc in 1 kg of alloy.

$=28%$

Question 5:

In a class, 60% of the total number of students are boys and there are 14 girls. How many students are there in the class?

$=\left(x×\frac{40}{100}\right)\phantom{\rule{0ex}{0ex}}=\frac{40x}{100}\phantom{\rule{0ex}{0ex}}$

Question 6:

Which is largest in $8\frac{1}{3}%,\frac{4}{25}$ and 0.15?

Question 7:

Mark (✓) against the correct answer:
What per cent of
(a) 2.5%
(b) 5%
(c) 7.5%
(d) 10%

(d) 10%

Question 8:

Mark (✓) against the correct answer:
A number decreased by 30% gives 84. The number is
(a) 90
(b) 110
(c) 120
(d) 135

(c) 120

Question 9:

Mark (✓) against the correct answer:
(?)% of 320 is 48?
(a) 25%
(b) 15%
(c) 14%
(d) 9%

(b) 15%

Question 10:

Mark (✓) against the correct answer:
What per cent of 45 is 54?
(a) $83\frac{1}{3}%$
(b) 104%
(c) 108%
(d) 120%

(d) 120%

Question 11:

Mark (✓) against the correct answer:
A number exceeds 25% of itself by 60. The number is
(a) 75
(b) 45
(c) 80
(d) 65

(c) 80

Question 12:

Mark (✓) against the correct answer:
5% of which number is 12?
(a) 120
(b) 180
(c) 240
(d) 320

(c) 240

Question 13:

Fill in the blanks.
(i) $7\frac{1}{2}%$ of Rs 1200 = .........
(ii) 240 mL is ......... % of 3 L.
(iii) If x% of 35 is 42, then x = .........
(iv) $\frac{12}{5}$ = .........%.
(v) 120 = (.........)% of 80.

Question 14:

Write 'T' for true and 'F' for false for each of the following:
(i) 6% of 8 is 48.
(ii) 6 : 5 = 30%.
(iii) $\frac{3}{5}=60%.$
(iv) 6 hours = 25% of a day.