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Introduction to Percentages Video Lecture | Mathematical Reasoning and Aptitude for UGC NET
FAQs on Introduction to Percentages Video Lecture - Mathematical Reasoning and Aptitude for UGC NET
| 1. What is a percentage? |  |
Ans. A percentage is a way to express a part or a proportion of a whole in terms of 100. It represents the value out of 100 and is denoted by the symbol "%". For example, if you score 80% in a test, it means you achieved 80 out of 100 possible marks.
| 2. How do you calculate a percentage? | |
Ans. To calculate a percentage, divide the part by the whole and multiply the result by 100. The formula for calculating percentage is: Percentage = (Part/Whole) * 100. For example, if you want to find out what percentage of 50 is 20, you would divide 20 by 50 and multiply the result by 100, giving you 40%.
| 3. How can percentages be used in everyday life? | |
Ans. Percentages are used in various aspects of everyday life. They are commonly used in finance, such as calculating discounts, interest rates, and taxes. Percentages are also used in statistics to represent data or probability. Additionally, they are used in sports to track player performance or team statistics.
| 4. What is the difference between percentage increase and percentage decrease? | |
Ans. Percentage increase refers to the amount a value has grown in comparison to its original value, expressed as a percentage. It is calculated by subtracting the original value from the new value, dividing the result by the original value, and multiplying by 100. Percentage decrease, on the other hand, represents the amount a value has decreased in comparison to its original value, also expressed as a percentage. It is calculated in the same way as percentage increase, but the subtraction is done the other way around.
| 5. How do you calculate the percentage change between two numbers? | |
Ans. To calculate the percentage change between two numbers, subtract the old value from the new value, divide the result by the old value, and multiply by 100. The formula for percentage change is: Percentage Change = ((New Value - Old Value) / Old Value) * 100. This calculation is useful for determining the relative increase or decrease between two values.
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