Topic Details (Notes format)

How to Solve Percent Proportions

Subject: Mathematics

Book: Maths Mastery

Percent proportion sets up the ratio part/whole = percent/100. If you want to find what percent of 60 is 12, you set 12/60 = x/100. Cross-multiplying yields 12 × 100 = 60x, so x = 20%. Similarly, for “What is 15% of 80?”, the proportion is x/80 = 15/100, resulting in x = 12. This approach is the bedrock for computing discounts, tip calculations, and test score conversions. Familiarity with percent proportions fosters a systematic, quick solution for many percentage-based problems across financial, academic, or daily contexts.

Practice Questions

What is the greatest common divisor (GCD) of 36 and 48?

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If a rectangle has a length of 10 cm and a width of 6 cm, what is its perimeter?

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If a = 2 and b = 3, what is the value of (a^2 + b^2)?

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How many ways can 4 people sit in a row?

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A rectangle has an area of 48 cm² and a length of 8 cm. What is its width?

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If x^2 - 6x + 9 = 0, what is the value of x?

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What is the probability of drawing a king from a standard deck of 52 playing cards?

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The simple interest on Rs. 4000 at 5% per annum for 2 years is:

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How many diagonals does a pentagon have?

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A triangle has angles 60°, 60°, and 60°. What type of triangle is it?

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