is fifty-fifty; has an equal chance
勝負は五分五分だぞ
It’s anyone’s game.
— 紅の豚 (1992)
私たちのチームがその試合に勝てるかどうかは五分五分だ。
It's a toss-up whether our team will win the game.
彼が回復する見込みは五分五分だ。
His chances of recovery are fifty-fifty.
次にまた見られるかどうかは五分五分だ。
It's a toss-up whether we'll see it again.