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Simple and Compound Interest: Complete Guide, Formulas, Examples and Differences

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 Why Do We Use Simple Interest and Compound Interest?                In real life, money does not always remain the same when it is borrowed, saved, deposited, or invested for a period of time . If one person gives another person money to use for some time, there is usually a financial cost or return for that use of money. Interest is the way that extra money is calculated. For example, imagine that you have ₹10,000. You could keep it with yourself, but instead you put it in a bank. The bank may use your money and, in return, give you some additional money after a certain period. Similarly, if you need ₹10,000 but do not have it, you may borrow it from a bank. The bank gives you the money now, and you repay the original amount along with an additional amount called interest. Therefore, interest helps us calculate the cost of borrowing money or the return earned from saving and investing money . Simple and Compound Interest  Introd...
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Cost Price and Selling Price & Formula

                                                                                  PROFIT AND LOSS                      Introduction  Imagine you decide to sell homemade chocolate cookies. You spend ₹500 buying flour, butter, sugar, and chocolate. After baking and selling all the cookies, you collect ₹750 from your customers. Now ask yourself: Did you earn money? If yes, how much? Or imagine another situation. You buy a second-hand bicycle for ₹3,000 hoping to sell it for more. But after waiting for weeks, no one is willing to pay more than ₹2,500. What happened? Did you lose money? These two simple situations introduce one of the most useful concepts in mathematics and busines...
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What is Ratio and Proportion?

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  Ratio and Proportion – Definition, Formula, Examples, and Tricks Introduction                                              Ratio and proportion are two of the most important concepts in mathematics. They help us compare quantities and understand the relationship between different values. These concepts are widely used in school mathematics, Banking, Railway, UPSC, and in everyday life such as cooking, shopping, business, and map reading. In this article, you will learn the meaning of ratio and proportion, their formulas, properties, solved examples, and real-life applications in a simple and easy-to-understand way. What is Ratio? A ratio is a comparison of two or more quantities by division. It shows how much of one quantity exists compared to another. Definition A ratio compares two quantities of the same kind. Formula Ratio = First Quantity : S...
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Percentage

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  Complete Percentage Guide                       Percentage is a mathematical concept that means "per hundred" or "out of every 100." The word percentage comes from the Latin words per (for every) and centum (hundred). It was introduced to make comparisons easier because fractions with different denominators (such as 3/5 and 7/10) are difficult to compare directly. By converting all values to a common base of 100 , comparisons become simple and clear. The symbol % represents "out of 100 ." For example, 25% means 25 out of 100, and 100% means the whole quantity. Today, percentages are widely used in examinations, banking, business, discounts, taxes, statistics, and everyday calculations because they provide a standard and easy way to express parts of a whole.       25%=25\100​=0.25   Fractions, decimals, and percentages           ...
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