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Comparing Quantities Lessons
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Post a LessonAnswered on 27/02/2024 Learn CBSE - Class 7/Maths/Comparing Quantities
Sadika
To find the percentage of 5 oranges out of 25 fruits, you need to first calculate the fraction of oranges out of the total fruits, and then convert it to a percentage.
Number of oranges = 5 Total number of fruits = 25
Fraction of oranges = (Number of oranges / Total number of fruits) = (5 / 25) = 1/5
To convert the fraction to a percentage, multiply by 100:
Percentage = Fraction * 100 = (1/5) * 100 = 20%
So, 5 oranges out of 25 fruits represent 20% of the total fruits.
Answered on 27/02/2024 Learn CBSE - Class 7/Maths/Comparing Quantities
Sadika
To determine whose performance is better, we can compare their scores as a percentage of the total marks available.
Rahul's percentage: Rahul's score = 150 Total marks available = 200
Percentage = (Rahul's score / Total marks available) * 100 Percentage = (150 / 200) * 100 Percentage = 75%
Prabha's percentage: Prabha's score = 180 Total marks available = 300
Percentage = (Prabha's score / Total marks available) * 100 Percentage = (180 / 300) * 100 Percentage = 60%
Comparing the percentages: Rahul: 75% Prabha: 60%
Since Rahul's percentage is higher (75% > 60%), Rahul's performance is better.
Answered on 27/02/2024 Learn CBSE - Class 7/Maths/Comparing Quantities
Sadika
Answered on 27/02/2024 Learn CBSE - Class 7/Maths/Comparing Quantities
Sadika
To find the discount and discount percentage, we need to first calculate the amount of discount and then express it as a percentage of the original price.
Given: Marked price (M) = Rs. 850 Selling price (S) = Rs. 765
Discount (D) = Marked price - Selling price = Rs. 850 - Rs. 765 = Rs. 85
Now, let's calculate the discount percentage:
Discount percentage = (Discount / Marked price) * 100 = (85 / 850) * 100 = (1 / 10) * 100 = 10%
So, the discount is Rs. 85 and the discount percentage is 10%.
Answered on 27/02/2024 Learn CBSE - Class 7/Maths/Comparing Quantities
Sadika
To find the bill amount after including the sales tax, we need to calculate the sales tax amount and then add it to the original cost of the roller skates.
Given: Cost of roller skates = Rs 450 Sales tax rate = 5%
First, let's calculate the sales tax amount: Sales tax amount = (5/100) * Cost of roller skates = (5/100) * 450 = 22.5
Now, let's add the sales tax amount to the original cost to find the bill amount: Bill amount = Cost of roller skates + Sales tax amount = 450 + 22.5 = 472.5
So, the bill amount after including the sales tax is Rs 472.50.
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