The preliminary results showed the richest quintile of households received about 12 per cent of social assistance benefits while the second richest quintile got 11 per cent.I sounded like the word quartile, which I knew had something to do with quarters. [Here's the definition from Math Dictionary.] So I suggested quintile might relate to fifths.
And it does. The opening line of the article in The Age said:
The richest fifth of households receive nearly half of all the wages paid in Australia - but also get about 12 per cent of all government handouts, new research by the Bureau of Statistics show.Here's a more exact definition of the word from the Merriam-Webster