Class7 Maths : Percentage
What is Percentage?
The word percentage means “per hundred”.
It is used to compare quantities by converting them into fractions of 100.
The symbol for percentage is %.
👉 Example:
50% means 50 out of 100 or 50/100.
Important Points to Remember
- Percentage always has 100 as the denominator
- To convert a fraction into percentage → multiply by 100
- To convert a percentage into fraction → divide by 100
- Percentages are widely used in marks, discounts, profit & loss, population, and statistics.
Question 1
Find the percentage of 25 out of 100.
Solution:
25/100 x 100 =1/4 x 100 = 100/4 = 25
Answer: 25%
Question 2
Find the percentage of 20 out of 50.
Solution:
20/50 x 100 = 2/5 x 100 = 200/5 = 40
Answer: 40%
Question 3
A student scored 45 marks out of 60. Find the percentage.
Solution:
45/60 x 100 = 3/4 x 100 = 300/4 = 75
Answer: 75%
Question 4
Convert 3/5 into percentage.
Solution:
3/5 x 100 = 300/5 = 60
Answer: 60%
Question 5
Convert 0.25 into percentage.
Solution:
25/100 x 100 = 2500/100 = 25
Answer: 25%
Question 6
What is 10% of 200?
Solution:
10/100 x 200 = 1/10 x 200 = 200/10 = 20
Answer: 20
Question 7
Find 25% of 80.
Solution:
25/100 x 80 = 1/4 x 80 = 80/4 = 20
Answer: 20
Question 8
If the total number of students is 40 and 30 are present, find the percentage of students present.
Solution:
30/40 100 = 3/4 x 100 = 300/4 = 75
Answer: 75%
Question 9
A shirt costs ₹500. If the discount is 20%, find the discount amount.
Solution:
20/100 x 500 = 1/5 x 500 = 500/5 = 100
Answer: Discount = ₹100
Question 10
Out of 200 fruits, 50 are spoiled. Find the percentage of spoiled fruits.
Solution:
50/200 x 100 = 1/4 x 100 = 100/4 = 25
Answer: 25%
Real-Life Uses of Percentage
- Exam results and marks
- Discounts while shopping
- Profit and loss in business
- Population growth
- Sports statistics
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