Percentage Practice Question and Answer

Q:

In an examination in which full marks were 700, A gets 20 % more than B, B gets 20 % more than C, and Cgets 15 % less than D. If A got 576 marks, then what percentage of full marks did D get? 

575 0

  • 1
    67.22 %
    Correct
    Wrong
  • 2
    68.22 %
    Correct
    Wrong
  • 3
    65,22 %
    Correct
    Wrong
  • 4
    66.22 %
    Correct
    Wrong
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Answer : 1. "67.22 % "

Q:

The cost of an article was 75. The cost was first increased by 20% and later on it was reduced by 20%. The present cost of the article is:

575 0

  • 1
    72
    Correct
    Wrong
  • 2
    60
    Correct
    Wrong
  • 3
    75
    Correct
    Wrong
  • 4
    90
    Correct
    Wrong
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Answer : 1. "72"

Q:

The population of a city in the year 2020 was 2,00,000. The rate of growth of population is 8% per annum. Find the population of that city in the year 2022.

574 0

  • 1
    2,29,484
    Correct
    Wrong
  • 2
    2,33,280
    Correct
    Wrong
  • 3
    2,21,785
    Correct
    Wrong
  • 4
    2,12,890
    Correct
    Wrong
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Answer : 2. "2,33,280"

Q:

In an examination 60% of the students passed in English and 70% in Mathematics, if 20% of the students failed in both the subjects and 2500 students passed in both the subjects, then what is the total number of candidates?

570 0

  • 1
    4000
    Correct
    Wrong
  • 2
    5000
    Correct
    Wrong
  • 3
    3000
    Correct
    Wrong
  • 4
    3500
    Correct
    Wrong
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Answer : 2. "5000"

Q:

Manju's salary is 60% more than Sohan's then tell what % Sohan's salary is less than Manju's salary?

567 0

  • 1
    25%
    Correct
    Wrong
  • 2
    37.50%
    Correct
    Wrong
  • 3
    22.50%
    Correct
    Wrong
  • 4
    45%
    Correct
    Wrong
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Answer : 2. "37.50%"

Q:

If 15% of 40 is 2 more than 25% of a number, then the number will be

566 0

  • 1
    36
    Correct
    Wrong
  • 2
    24
    Correct
    Wrong
  • 3
    16
    Correct
    Wrong
  • 4
    12
    Correct
    Wrong
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Answer : 3. "16"

Q:

The average monthly salary of all the employees in a company is ₹ 12,000. Among them the average salary of male employees is ₹15,000 and that of female employees is ₹8000. Accordingly, what is the ratio of male and female employees?

564 0

  • 1
    5 : 2
    Correct
    Wrong
  • 2
    3 : 4
    Correct
    Wrong
  • 3
    4: 3
    Correct
    Wrong
  • 4
    2 : 5
    Correct
    Wrong
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Answer : 3. "4: 3"

Q:

The price of sugar increases by 15%. By what percentage should the consumption of sugar be decreased so that the expenditure on the purchase of sugar remains the same? [Give your answer correct to 2 decimal places.]

564 0

  • 1
    11.11%
    Correct
    Wrong
  • 2
    12.5%
    Correct
    Wrong
  • 3
    14.16%
    Correct
    Wrong
  • 4
    13.04%
    Correct
    Wrong
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Answer : 4. "13.04%"
Explanation :

To solve this problem, let's denote:

  • Initial price of sugar = P
  • Initial quantity consumed = Q
  • Initial expenditure = PQ

After the price increases by 15%, the new price becomes 1.15P.

To keep the expenditure constant, the new quantity consumed (let's call it Q') can be calculated using the formula:

New expenditure = New price × New quantity

Setting the new expenditure equal to the initial expenditure:

PQ = (1.15P) * Q'

Now, solve for Q':

Q' = PQ / (1.15P)

Simplify:

Q' = Q / 1.15

Now, let's find the percentage decrease in consumption:

Percentage decrease = [(Q - Q') / Q] * 100

Substituting the value of Q':

Percentage decrease = [(Q - (Q / 1.15)) / Q] * 100

Percentage decrease = [(Q * (1 - 1/1.15)) / Q] * 100

Percentage decrease ≈ [(1 - 0.8696) * 100] ≈ 13.04%

Therefore, the consumption of sugar should be decreased by approximately 13.04% to keep the expenditure on the purchase of sugar the same after a 15% increase in price.

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