CBSE · Class 8 · Mathematics · Chapter 8

Fractions in Disguise

Connect fractions, decimals and percentages and apply conversions to practical problems.

12 lessons 55 min
Start chapter

Lessons in this chapter

  1. 1Fractions as PercentagesUnderstand percentages as fractions out of one hundred, convert between forms and compare shares.
  2. 2Percentage of Some QuantityFind percentages of quantities using bar models, proportional reasoning and mental calculation.
  3. 3The FDP Trio — Fractions, Decimals, and PercentagesConnect fractions, decimals and percentages; estimate shares and interpret mixture ratios.
  4. 4Finding the Whole and Percentages Greater than 100Recover a whole from a known percentage and interpret quantities greater than one hundred per cent.
  5. 5Using Percentages to Compare ProportionsCompare proportions with different totals and interpret ingredient labels and population shares.
  6. 6Percentage Increase or DecreaseCalculate percentage changes, use final-value multipliers and recover original quantities.
  7. 7Profit and LossCalculate profit and loss on cost, recover prices and combine transactions accurately.
  8. 8Discounts and TaxesCalculate discounts and stated taxes, and distinguish gross profit, net profit and revenue bases.
  9. 9Growth and CompoundingDerive simple and compound interest relationships and apply repeated percentage growth.
  10. 10Decline and Repeated Percentage ChangeModel depreciation, repeated decline and successive changes with updated percentage bases.
  11. 11Tricky PercentagesReason through offers, successive discounts, markups, subgroup percentages and changing totals.
  12. 12Chapter Summary and PracticeRevise every major chapter concept and formula, interpret diagrams and solve mixed problems.
← All Class 8 Mathematics chapters