Parts of a whole, and how they compare. Two published boards so far: one that does not let anybody off simplifying, and one where the only fraction that matters is a half.
Fractured Fractions cuts a picture with a single point and asks that every piece come out holding the fraction written on its card. The pieces show what they actually are — 7/21, 10/15, 30/72 — and the cards say 1/3, 2/3, 5/12, so the only road from one to the other is reducing. The harder packs never show a rectangle already wearing its answer in lowest terms. Voronoi Islands shares an island out by distance and gives a point to whoever holds more than half of it when their turn starts, so the share written over the board is the whole score, and 49.9% is not enough. More fraction boards are built and in testing; they reach this shelf one at a time, when they are good enough to keep.