Mathematics Questions and Answers – Estimations in Percentage

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This set of Mathematics Multiple Choice Questions & Answers (MCQs) focuses on “Estimations in Percentage”.

1. Calculate 10% of 557.65.
a) 557.65
b) 55.765
c) 5.5765
d) 0.55765
View Answer

Answer: b
Explanation: 10% of any number is shifting decimal places one place to the left. 10% of 557.65 means shifting decimal one place to left making it 55.765.
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2. Calculate 15% of 882.
a) 88.2
b) 44.1
c) 132.3
d) 882
View Answer

Answer: c
Explanation: 10% of any number is shifting decimal places one place to the left. 10% of 882 means shifting decimal one place to left making it 88.2. 5% any number is \(\frac{1}{2}\) of 10% of any number. Thus, 5% of 882 means \(\frac{1}{2}\) × 88.2 = 44.1. Thus, 15% of 882 = 88.2 + 44.1 = 132.3.

3. Calculate 25% of 776.
a) 776
b) 388
c) 97
d) 194
View Answer

Answer: d
Explanation: 25% of any number is dividing the number by 4.
\(\frac{1}{4}\)×776=194.
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4. Calculate 20% of 1266.
a) 253.2
b) 126.6
c) 63.3
d) 31.1
View Answer

Answer: a
Explanation: 10% of 1266 is moving one decimal to the left which gives us 126.6. 20% is twice the number obtained by 10%. Thus, 20% of 1266 is 253.2.

5. A bill in a shop is Rs. 533.6. Shopkeeper offered 10% discount. What is the amount to be paid to shopkeeper?
a) Rs.500
b) Rs.480
c) Rs. 150
d) Rs.200
View Answer

Answer: b
Explanation: 10% of 533.6 is moving one decimal to the left which gives us 53.36.
Discounted amount = 533.36 – 53.36
By approximation, discounted amount = 533 – 53 = 480.
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6. The list price of dress is Rs. 3000. There is 30% discount on the item. What is the sell price?
a) Rs.2200
b) Rs.900
c) Rs.2100
d) Rs.2500
View Answer

Answer: c
Explanation: List price of dress is Rs. 3000. Discount on item is 30%.
10% of 3000 is moving one decimal point to the left which gives us 300.
30% is thrice 10% giving us 900.
Hence, sell price = list price – discount = 2100.

7. The list price of dress is Rs. 1500. There is 20% discount on the item. What is the discount offered on the dress?
a) Rs.300
b) Rs.450
c) Rs.150
d) Rs.750
View Answer

Answer: a
Explanation: List price of shirt is Rs. 1500. Discount on item is 20%.
10% of 1500 is 150.
20% is twice 10% which gives us 300.
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8. Zayn bought tickets to concert for Rs. 5000. He wants to sell them at a premium of 20%. What is the selling price of tickets?
a) Rs.5000
b) Rs.1200
c) Rs.4500
d) Rs.6000
View Answer

Answer: d
Explanation: Buying price of tickets is Rs. 5000. Premium on tickets is 20%
10% of 5000 is 500. 20% of any number is twice 10% of number which gives us 1000.
Selling price = Buying price + Premium = 5000 + 1000 = 6000.

9. Zayn bought tickets to concert for Rs. 2700. He wants to sell them at a discount of 15%. What is the selling price of tickets?
a) Rs.2295
b) Rs.1200
c) Rs.2700
d) Rs.3105
View Answer

Answer: a
Explanation: Buying price of tickets is Rs. 2700. Discount on tickets is 15%
10% of 2700 is 270.
5% of any number is \(\frac{1}{2}\) of 10% of number. 5% of 2700 is 135.
15% of number is sum of 10% of number and 5% of number = 270 + 135 = 405.
Selling price = Buying price – Discount = 2700 – 405 = 2295.
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10. Zayn bought tickets to concert for Rs. 3500. He wants to sell them at a discount of 15%. What is the discount in Rs.?
a) Rs.1525
b) Rs.350
c) Rs.525
d) Rs.1050
View Answer

Answer: c
Explanation: Buying price of tickets is Rs. 3500. Discount on tickets is 15%.
10% of 3500 is 350.
5% of any number is \(\frac{1}{2}\) of 10% of number. 5% of 3500 is 175.
15% of number is sum of 10% of number and 5% of number = 350 + 175 = 525.

Sanfoundry Global Education & Learning Series – Mathematics – Class 8.

To practice all areas of Mathematics, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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