Subject: Mathematics
Book: Maths Mastery
Percentages are central to countless real-world applications—from calculating exam marks to determining discounts and interest rates. The general formula to find a percentage is: (Part / Whole) × 100%. However, if you already know the rate and the whole, use Percentage of a Number = (Rate ÷ 100) × Whole. For example, to calculate 20% of 150, convert 20% to 0.20, then multiply: 0.20 × 150 = 30. This concept is pivotal in areas like finance and data analysis, so practice by computing percentages for tips in restaurants, taxes on shopping bills, or proportionate contributions in group projects. Mastering this skill builds a strong foundation for advanced percentage operations such as percentage increase, decrease, and compound interest calculations.
If a = 2 and b = 3, what is the value of (a^2 + b^2)?
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View QuestionWhat is the cube of 4?
View QuestionIf the cost price of an item is Rs. 400 and the selling price is Rs. 500, what is the profit percentage?
View QuestionIf x:y = 4:5 and y:z = 2:3, what is x:z?
View QuestionA cone has a base radius of 7 cm and height of 24 cm. What is its volume?
View QuestionIf two complementary angles differ by 30°, what are the angles?
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