Percentage Practice Question and Answer
8 Q: If the population of a town is 64000 and its annual increase is 10%, then its population at the end of 3 yeas will be :
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5ffeb3682d048e6d03a84020- 180000false
- 285184true
- 385000false
- 485100false
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Answer : 2. "85184"
Q: A person spends 40% of his monthly income. The monthly income of the person is increased by 15% and his expenditure is decreased by 22%. What is the approximate percentage increase in his savings?
1897 06422546b32185cce37079454
6422546b32185cce37079454- 140%true
- 244%false
- 332%false
- 436%false
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Answer : 1. "40%"
Q: Madhur scored 101 marks in Hindi, 100 in Science, 96 in Sanskrit, 108 in Maths and 78 in English if the maximum marks in each subject is equal and Madhur secured 84 percent marks in all the subjects. What will be the maximum marks for each subject?
1890 06322fe33cb090a254fcf9bab
6322fe33cb090a254fcf9bab- 1110false
- 2120false
- 3115true
- 4100false
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Answer : 3. "115"
Q: What percentage of 5.6 kg is 140 grams?
1887 05f1e66ad3b87486bfc535700
5f1e66ad3b87486bfc535700- 11.8false
- 22.5true
- 32false
- 41.5false
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Answer : 2. "2.5"
Q: The difference of two numbers is 20 % of the larger number. If the smaller number is 20, the larger number is:
1882 05dad6e0f55abe308d80142d5
5dad6e0f55abe308d80142d5- 125true
- 245false
- 350false
- 480false
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Answer : 1. "25 "
Q: The marked price of a table is 130% of its cost price. A discount of 20% is given on the sale of the table. What will be the profit percentage?
1882 0642c0aab7ac9a186e4e7cbf3
642c0aab7ac9a186e4e7cbf3- 16%false
- 28%false
- 35%false
- 44%true
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Answer : 4. "4% "
Q: If 40% of (A+B) = 60% of (A-B) then $${2A-3B}\over {A+B}$$ is
1875 065424ed827398ecb26d95af5
65424ed827398ecb26d95af5- 1$${7\over 6}$$true
- 2$${6\over 7}$$false
- 3$${5\over 6}$$false
- 4$${6\over 5}$$false
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Answer : 1. "$${7\over 6}$$"
Explanation :
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.]
1875 0643d140332185cce373eec85
643d140332185cce373eec85- 111.11%false
- 212.5%false
- 314.16%false
- 413.04%true
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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.