Could you, please, help me with this sentence. If I were to say such a sentence should I say "a half of the first floor"?<br/><br/>"She's been mopping for hours and only finished maybe 1/2 of 1st floor".<br/><br/>Is it correct to say:<br/><br/>"She's beem mopping for hours, but she hasn't reached a halfway"?<br/><br/>Thank you