# Coverage Gaps — Fractions G3–G8

Skills the source suggested but for which no LO was authored, with rationale.

## G3

(none)

## G4

(none)

## G5

(none)

## G6

- **Egyptian fractions puzzle (write 1 as sum of three / four distinct unit fractions).** Pedagogically rich, but it is an investigative puzzle building on `recognise-equivalent-fractions` + `compute-fraction-sum-same-denominator` rather than a separately assessable skill. Deliberately not split out as an LO.
- **"How many fractions lie between 0 and 1?"** (Sec 7.4). This is an early introduction to density of rationals on the number line — a conceptual question that NCERT poses but does not assess. Not authored under R-PROV-3 — no assessable skill is being taught here.

## G7

- **Order of multiplication (commutativity of fraction multiplication).** Mentioned in Sec 8.1 ("Order of Multiplication"). The skill is properly subsumed under `compute-product-of-two-fractions` (both orders evaluate the same) and is not separately assessable. Not split out.

## G8

The G8 NCERT chapter "Fractions in Disguise" is broader than the fractions thread per se. The following sections were deliberately scoped OUT of the fractions thread (and belong in a separate commercial-math / percentages-application thread, to be authored later):

- 1.3 Percentage increase / decrease (tomato price; cinema footfall).
- 1.3 Profit and loss (Kishanlal's sweater; Shambhavi's shop).
- 1.3 Discount (35% off MRP).
- 1.3 GST / taxes.
- 1.4 Simple and compound interest (FD).

These rely on the fraction LOs in this thread (especially `convert-fraction-to-percentage`, `compute-percentage-of-quantity`) but the assessable skills themselves (`compute-percentage-increase`, `compute-profit-margin`, `compute-compound-interest`) are NOT fraction skills and should not be authored here.

## Forward-looking gap

- **Rational numbers with sign (extending fractions to negatives).** G8 NCERT Ganita Prakash does not formally introduce signed rationals as a labelled topic. This is deferred to the future `integers_to_reals` thread (G9+). A single cross-thread proposed edge captures the intended dependency.