for "1 1/2" there is a special word (feminine полторы́; in oblique cases полу́тора; requires genitive): – 3/2 apples. it can be used with larger numbers ( – 1 500, – 1 500 000) and, for approximate values, with smaller numbers ( – ≈15, – ≈150). there was also now-outdated form for exactly 150. as with other single-word numerals, it's possible to form nouns and multiplicative adjectives, associated with "1.5": ( with 1.5 tonnes of payload capacity), (1.5 liter plastic bottle for beverage); (something of 150% amount).