# Coverage Matrix — Fractions G8

Primary source: NCERT Ganita Prakash G8 Part 2, Chapter 1 "Fractions in Disguise"

Note on scope: G8 NCERT does not formally introduce "rational numbers" as a distinct labelled topic. The fractions-thread content at G8 is concentrated in "Fractions in Disguise" (percentages = fractions with denominator 100). Profit/loss, interest, and percentage-change content is informally still under this chapter but properly belongs in the commercial-math thread (not the fractions thread). Only fraction-skill rows from Sections 1.1–1.2 are mapped here; downstream commercial-math sections are marked out of LO scope for this thread.

| Chapter | Section | LO id(s) | Notes |
|---|---|---|---|
| 1 Fractions in Disguise | 1.1 Fractions as Percentages — % symbol, "per cent" meaning, 25% = 25/100 | cbse-math-recognise-percentage-as-fraction | — |
| 1 Fractions in Disguise | 1.1 Expressing Fractions as Percentages — Surya's red paint 3/4 = 75% (3 methods + bar model) | cbse-math-convert-fraction-to-percentage | — |
| 1 Fractions in Disguise | 1.1 Example 2 — Surya's prize money 2/5 = 40% | cbse-math-convert-fraction-to-percentage | — |
| 1 Fractions in Disguise | 1.1 Example 3 — express 24% as a fraction (24/100 = 6/25) | cbse-math-convert-percentage-to-fraction | — |
| 1 Fractions in Disguise | 1.1 Figure it Out — express 3/5, 7/14, 9/20, 72/150, 1/3, 5/11 as percentages | cbse-math-convert-fraction-to-percentage | — |
| 1 Fractions in Disguise | 1.1 Figure it Out — Nandini's marbles (15/25), students walking (15/80), runners' positions | cbse-math-convert-fraction-to-percentage | applied |
| 1 Fractions in Disguise | 1.1 Figure it Out — symbol comparisons 50% vs 5%; 5/10 vs 50%; 3/11 vs 61% | cbse-math-convert-fraction-to-percentage | — |
| 1 Fractions in Disguise | 1.1 Why 100? — base-10 connection (31% = 31/100 = 0.31) | — | out of LO scope — pedagogical rationale, no assessable skill within fractions thread |
| 1 Fractions in Disguise | 1.1 Historical box — Kautilya's Arthaśhāstra, Romans, 15th-century Italian | — | out of LO scope — historical callout |
| 1 Fractions in Disguise | 1.1 Percentages Around Us — population stats etc. | — | out of LO scope — context, no new skill |
| 1 Fractions in Disguise | 1.2 Percentage of Some Quantity — Madhu vs Madhav biscuit sugar (25% of 120 g; 35% of 95 g) | cbse-math-compute-percentage-of-quantity | — |
| 1 Fractions in Disguise | 1.2 Free-hand Computations — mental computation table (25%, 10%, 20%, 5%) | cbse-math-compute-percentage-of-quantity | — |
| 1 Fractions in Disguise | 1.2 The FDP Trio — Fractions/Decimals/Percentages — fill the table | cbse-math-recognise-percentage-as-fraction; cbse-math-convert-percentage-to-fraction | converts via fraction; decimal side is cross-thread |
| 1 Fractions in Disguise | 1.2 Activity — How Close Can You Get? (estimation game) | cbse-math-convert-fraction-to-percentage | game-based assessment of conversion skill |
| 1 Fractions in Disguise | 1.2 Example 3 — Zubin's A-grade marks (80% of 75 = 60) | cbse-math-compute-percentage-of-quantity | applied |
| 1 Fractions in Disguise | 1.2 Example 4 — millet kanji 2:7 ratio = 22.22% millet | cbse-math-compute-percentage-of-quantity | applied — ratio-to-percentage via fraction |
| 1 Fractions in Disguise | 1.2 Example 5 — cyclist Delhi/Agra 40% / 92 km / find remaining | cbse-math-compute-percentage-of-quantity | applied |
| 1 Fractions in Disguise | 1.2 Figure it Out — 25% of 160, 16% of 250, 62% of 360, 140% of 40 etc. | cbse-math-compute-percentage-of-quantity | — |
| 1 Fractions in Disguise | 1.3 Using Percentages — To Compare Proportions (Eesha's marks) | cbse-math-convert-fraction-to-percentage | review — covered by conversion + comparison; no new fraction skill |
| 1 Fractions in Disguise | 1.3 Know Your Contents (KYC) — badam-drink labels, % composition | cbse-math-convert-fraction-to-percentage | — |
| 1 Fractions in Disguise | 1.3 Percentage Increase or Decrease — tomato price, footfall | — | out of LO scope — belongs in commercial-math / percentages thread, not fractions thread |
| 1 Fractions in Disguise | 1.3 Profit and Loss — Kishanlal sweater | — | out of LO scope — commercial-math |
| 1 Fractions in Disguise | 1.3 Taxes (GST) | — | out of LO scope — commercial-math |
| 1 Fractions in Disguise | 1.4 Interest (simple and compound FD) | — | out of LO scope — commercial-math |
| 1 Fractions in Disguise | Chapter summary | — | out of LO scope — chapter recap |