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MathematicsClass 8Disguise

Disguise | Class 8 Mathematics Notes

By ConceptScroll Team · Published on 17 July 2026 · 2 min read

Disguise – this guide gives you a concise, exam-ready overview of Disguise from Class 8 Mathematics, written by ConceptScroll editors and reviewed against the latest NCERT textbook.

Percentages as Another Form of Number Representation

Percentages express numbers as parts of 100, making them a convenient way to compare ratios and proportions. The section explains that the term 'percent' means per hundred. Any fraction or decimal can be converted into a percentage by multiplying by 100. Conversely, percentages can be converted back to decimals or fractions. The section covers the importance of percentages in daily life, such as calculating discounts, interest rates, and statistics. It also explains how to solve problems involving percentage increase or decrease. Understanding percentages helps in interpreting data in various fields like finance, economics, and social sciences. The section provides step-by-step methods for converting between percentages, decimals, and fractions and solving related problems.

📊 Diagram: Pie chart illustrating 100 parts with shaded sections representing different percentages, and a bar graph showing percentage increases and decreases.

🧪 Activity: Activity: Calculate percentage discounts on given prices and find final amounts.

🔗 Connection: This section connects to the next one on solving problems involving conversions among fractions, decimals, and percentages.

Frequently asked questions

What is a fraction and how is it generally represented in mathematics?

A fraction is a number that represents parts of a whole. It is generally represented as a/b, where 'a' is the numerator indicating the number of parts considered, and 'b' is the denominator indicating into how many equal parts the whole is divided.

Two fractions are given as $\frac{2}{3}$ and $\frac{4}{6}$. Are these fractions equivalent? Justify your answer using cross multiplication.

Yes, the fractions $\frac{2}{3}$ and $\frac{4}{6}$ are equivalent. Using cross multiplication, 2 × 6 = 12 and 3 × 4 = 12. Since both products are equal, the fractions are equivalent.

Simplify the fraction $\frac{18}{24}$ to its simplest form.

$\frac{3}{4}$

What is the place value of the digit 7 in the decimal number 45.376?

Thousandths

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