Percentage Practice Question and Answer

Q:

If price of the table is increased by 25%, then a person can buy 25 table less for Rs 25000. What is the original price (in Rs) of the table?

1270 1

  • 1
    225
    Correct
    Wrong
  • 2
    250
    Correct
    Wrong
  • 3
    200
    Correct
    Wrong
  • 4
    167
    Correct
    Wrong
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Answer : 3. "200"

Q:

Answer the following questions

Manoj gave 60% of his salary to his wife and invested rest amount in mutual funds. His wife spends 30% amount on grocery and 20% on rent. From remaining amount, she purchased gold worth Rs. 18000. Find salary of Manoj.

1269 0

  • 1
    Rs 60000
    Correct
    Wrong
  • 2
    Rs 54000
    Correct
    Wrong
  • 3
    Rs 64000
    Correct
    Wrong
  • 4
    Rs 58000
    Correct
    Wrong
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Answer : 1. "Rs 60000"

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.]

1264 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.

Q:

What is the 15 % of 34?

1263 0

  • 1
    5
    Correct
    Wrong
  • 2
    5.1
    Correct
    Wrong
  • 3
    4.9
    Correct
    Wrong
  • 4
    5.2
    Correct
    Wrong
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Answer : 2. "5.1"

Q:

60% boys are failed in History and 65% boys are failed in Geography while total 30% boys are failed in both the subjects. If total 1200 boys appeared in the examination then total how many boys are passed?

1259 0

  • 1
    560
    Correct
    Wrong
  • 2
    660
    Correct
    Wrong
  • 3
    330
    Correct
    Wrong
  • 4
    400
    Correct
    Wrong
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Answer : 2. "660"

Q:

In an examination, 93 % of students passed and 259 failed. The total number of students appearing at the examination was: 

1259 0

  • 1
    3950
    Correct
    Wrong
  • 2
    3850
    Correct
    Wrong
  • 3
    3700
    Correct
    Wrong
  • 4
    4200
    Correct
    Wrong
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Answer : 3. " 3700 "

Q:

A man spends a part of his monthly income and saves the rest. The ratio of his expenditure to the saving is 61 : 6. If his monthly income is Rs .8710, the amount of his monthly saving is 

1257 0

  • 1
    रु. 870
    Correct
    Wrong
  • 2
    रु. 980
    Correct
    Wrong
  • 3
    रु. 780
    Correct
    Wrong
  • 4
    रु. 690
    Correct
    Wrong
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Answer : 3. "रु. 780"

Q:

The average marks obtained in a class of 50 students is 70%. The average of first 25 is 60% and that of 24 is 80%. What is the marks obtained by the last student?

1252 0

  • 1
    90%
    Correct
    Wrong
  • 2
    60%
    Correct
    Wrong
  • 3
    80%
    Correct
    Wrong
  • 4
    70%
    Correct
    Wrong
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Answer : 3. "80%"

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