Las nueve y cuarto.
No. We say "A quarter to nine," or "quarter of nine," or "eight forty-five." Yes because it is fifteen minutes to nine and that (as far as I am concerned proper grammar
Nine hundred fifteen.
Quince
quince - which sounds like 'keen-say'
quince dias
fifteen thousand, four hundred nine.
Nine plus fifteen is 24!
nueve
It is 'quince' (pronounced 'KEENthay') ('th' as in 'thin')
To say "he is fifteen" in Spanish, you would say "él tiene quince años." Literally, this means "he has fifteen years." That may seem a little odd to English speakers, but that is how a person's age is described in Spanish.
Fifteen thousand, four hundred nine.
Seventeen and five thousand, nine hundred fifteen ten-thousandths.