Class 8 Maths Part 2 Chapter 1, Fractions in Disguise, opens Ganita Prakash Part II (2026-27) by treating percentages (‘per centum’, out of 100) as fractions with denominator 100, then applies them to discounts, GST/taxes, compound growth and tricky percentage comparisons.
What Class 8 Maths Chapter 1 Covers
1.1 Fractions as Percentages and 1.2 Percentage of Some Quantity convert between the FDP trio (Fractions, Decimals and Percentages), build mental free-hand benchmarks (10%, 25%, 50%, 1%), and work with percentages greater than 100%.
1.3 Using Percentages applies percentages to compare proportions, calculate percentage increase and decrease, profit and loss, sales tax/GST, and multi-year compounding growth.
Tricky Percentages and Peaceful Knights explain why a 20% increase followed by a 20% decrease does not return to the original value, ending with the Peaceful Knights chessboard puzzle.
Exercises in Chapter 1
- Figure it Out exercise sets throughout the chapter with real-world applications and puzzles.
Read Class 8 Maths Chapter 1 Online
More Chapters
- Next: Chapter 2: The Baudhāyana-Pythagoras Theorem
- All Maths chapters and the other Class 8 books: Class 8 NCERT books 2026-27
- All Class 1 to 12 NCERT Textbooks: NCERT Books PDF (Class 1–12)
- Every book chapter by chapter: NCERT chapter wise PDF
FAQ
Why is a 10% increase followed by a 10% decrease not equal to 0% change?
Because the 10% decrease acts on the new larger value (1.10 × 0.90 = 0.99), resulting in a net 1% decrease.
What is the FDP Trio in Ganita Prakash Part 2 Chapter 1?
Fractions, Decimals and Percentages—three interchangeable ways of representing the same part-to-whole relationship.