We have a 'fifty-fifty' chance of succeeding. [=we are as likely to succeed as we are to fail]
The bill for dinner came to $43, and she gave him a 'fifty'.
They divided/split the expenses 'fifty-fifty'. [='equally']
(..) And do you know how far away he was?. Sir, he was pretty far. From that book-suppository building, sir. All right, knock it off. Two hundred and fifty feet. He was feet away and shooting at a moving target. Oswald got off three rounds with an old ltalian bolt-action rifle in only siX seconds... (..)1987 Full Metal Jacket