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What is a Ratio? Video Lecture | Mathematics (Maths) Class 7 (Old NCERT)
FAQs on What is a Ratio? Video Lecture - Mathematics (Maths) Class 7 (Old NCERT)
| 1. What is a ratio? |  |
Ans. A ratio is a comparison of two or more quantities that shows how much one quantity is in relation to another. It is often expressed as a fraction or using the colon symbol (:).
| 2. How is a ratio expressed? | |
Ans. A ratio can be expressed in different ways. It can be written as a fraction, such as 3/5, or using the colon symbol, like 3:5. Both forms represent the same comparison between the quantities.
| 3. How can ratios be used in real-life situations? | |
Ans. Ratios are used in various real-life situations. For example, they can be used to compare ingredients in a recipe, determine the scale of a map, or analyze financial statements. Ratios help to understand the relationship and proportions between different quantities.
| 4. Can a ratio be simplified? | |
Ans. Yes, ratios can be simplified just like fractions. If the numerator and denominator have a common factor, it can be canceled out to simplify the ratio. For example, the ratio 4:8 can be simplified to 1:2 by dividing both numbers by 4.
| 5. How can ratios be used to solve problems? | |
Ans. Ratios can be used to solve problems by setting up proportions. Proportions are equations that state two ratios are equivalent. By cross-multiplying and solving the equation, the value of an unknown quantity can be determined. This method is often used in problems involving ratios, such as finding the missing value in a proportion.
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