Class 5 Exam > Class 5 Notes > Mathematics for Class 5 > Practice Questions with Solutions: Percentages
Class 5 Maths Practice Question Answers - Percentages
Q1: Find:
(a) 20% of 80
(b) 32% of 75
(c) 45% of 80 days
a) 20% of 80
Hence, 20% of 80 = 16.
(b) 32% of 75
Hence, 32% of 75 = 24
(c) 45% of 80 days
Hence, 45% of 80 days = 36 days.
Q2: Express each of the following as a percentage:
(a) 0.14
(b) 0.35
(c) 0.75
(a) 0.14 = (0.14 × 100)% = 14%.
(b) 0.35 = (0.35 × 100)% = 35%.
(c) 0.75 = (0.75 × 100)% = 75%.
(a) 11 / 20
(b) 14 / 25
(c) 27 / 50
(a)
(b)
(c)
(a) 15% is 24
(b) 36% is 117
To find the number based on the given percentage values, you can use the formula:
(a) We have, 15% of the required number = 24
We will take 100 on the other side and multiply it by 24
15 x required number = 24 x 100
15 x required number = 2400
Now we will take 15 on the other side and divide it
Required number = 
Hence, 160 is the required number whose 15% is 24.
(b) We have 36% of the required number = 117
We will take 100 on the other side and multiply it by 117
36 x required number = 117 x 100
36 x required number = 11700
Now we will take 36 on the other side and divide it
Required number = 
Hence, 325 is the required number whose 36% is 117.
Q5: What per cent of 80 is 60?To find what percent of 80 is 60, you can use the formula:
(a) 11%
(b) 72%
(c) 85%
(a) 11% = 11 / 100 = 0.11.
(b) 72% = 72 / 100 = 0.72.
(c) 85% = 85 / 100 = 0.85.
Remember: By a certain per cent we mean that many hundredths.
Q7: Express each of the following percents as a fraction:(a) 15%
(b) 64%
(c) 95%
(a) 15% = 15 / 100 = 3 / 20.
(b) 64% = 64 / 100 = 16 / 25.
(c) 95% = 95 / 100 = 19 / 20.
432 out of 600 is equivalent to the fraction 432/600.
Hence, the required percentage = 432/600 x 100% = 72%
Hence, Praveen scored 72% marks.
Q9: Mr Bhardwaj earns ₹ 75,200 per month. He pays 10% as income tax. How much does he pay as income tax?Mr Bhardwaj's monthly earnings = ₹ 75,200
Amount paid as income tax = 10% of ₹ 75,200
= ₹ 75,200 x 10/100 = ₹ 75,200 x 10/100 = ₹7,520
Q10: In a school, there are 725 students. Out of these, 32% are girls. How many girls are there? Also, find the number of boys in the school.Total number of students in the school = 725
Number of girls = 32% of 725 = 725 x 32/100 = 725 x 32/100 = 29 x 8 = 232.
Thus, number of boys in the school = 725 - 232 = 493.
The document Class 5 Maths Practice Question Answers - Percentages is a part of the Class 5 Course Mathematics for Class 5.
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FAQs on Class 5 Maths Practice Question Answers - Percentages
| 1. What is the formula to calculate percentage? |  |
Ans.The formula to calculate percentage is:
\[
\text{Percentage} = \left( \frac{\text{Part}}{\text{Whole}} \right) \times 100
\]
| 2. How do I convert a fraction to a percentage? | |
Ans.To convert a fraction to a percentage, divide the numerator by the denominator and then multiply the result by 100. For example, to convert \(\frac{1}{4}\) to a percentage:
\[
\frac{1}{4} = 0.25 \quad \Rightarrow \quad 0.25 \times 100 = 25\%
\]
| 3. What is the difference between a percentage and a fraction? | |
Ans.A percentage is a way of expressing a number as a fraction of 100, while a fraction represents a part of a whole. For example, 25% is equivalent to the fraction \(\frac{25}{100}\) or \(\frac{1}{4}\).
| 4. How do I calculate a percentage increase? | |
Ans.To calculate a percentage increase, use the formula:
\[
\text{Percentage Increase} = \left( \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \right) \times 100
\]
For example, if an item's price increases from $50 to $65:
\[
\text{Percentage Increase} = \left( \frac{65 - 50}{50} \right) \times 100 = 30\%
\]
| 5. What is a percentage decrease, and how is it calculated? | |
Ans.A percentage decrease shows how much a value has decreased relative to its original value. It is calculated using the formula:
\[
\text{Percentage Decrease} = \left( \frac{\text{Old Value} - \text{New Value}}{\text{Old Value}} \right) \times 100
\]
For example, if a product's price drops from $80 to $60:
\[
\text{Percentage Decrease} = \left( \frac{80 - 60}{80} \right) \times 100 = 25\%
\]
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