Mechanical Engineering Exam > Mechanical Engineering Videos > General Aptitude for GATE > Problems on Percentages
Problems on Percentages Video Lecture | General Aptitude for GATE - Mechanical Engineering
FAQs on Problems on Percentages Video Lecture - General Aptitude for GATE - Mechanical Engineering
| 1. What is a percentage? |  |
Ans. A percentage is a way of expressing a number as a fraction of 100. It is often denoted by the symbol "%".
| 2. How do you calculate a percentage of a number? | |
Ans. To calculate a percentage of a number, you multiply the number by the percentage and then divide by 100. For example, to find 20% of 50, you would calculate 50 * 20/100 = 10.
| 3. What is the formula for calculating percentage increase or decrease? | |
Ans. The formula for calculating percentage increase or decrease is (final value - initial value) / initial value * 100. If the result is positive, it is a percentage increase, and if it is negative, it is a percentage decrease.
| 4. How can percentages be used in real-life situations? | |
Ans. Percentages are commonly used in real-life situations such as calculating discounts on items, determining tax amounts, understanding interest rates on loans, and analyzing changes in quantities over time.
| 5. Can percentages be converted to fractions or decimals? | |
Ans. Yes, percentages can be converted to fractions by dividing the percentage by 100 and simplifying the fraction. They can also be converted to decimals by dividing the percentage by 100.
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