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.
What is the HCF of 72 and 120?
View QuestionIf sin(A) = 1/2 and A is acute, what is the value of A?
View QuestionWhat is the LCM of 15 and 20?
View QuestionThe perimeter of a rectangle is 40 cm, and its length is 12 cm. What is its width?
View QuestionIf a cylinder has a radius of 7 cm and height of 10 cm, what is its volume?
View QuestionIf log(100) = 2 and log(10) = 1, what is log(1000)?
View QuestionIf a:b = 7:9 and b:c = 5:6, what is a:c?
View QuestionWhat is the sum of all even numbers between 1 and 50?
View QuestionA rectangle has a length of 10 cm and a width of 5 cm. What is the diagonal of the rectangle?
View QuestionIf the radius of a circle is doubled, what happens to its area?
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