五分五分

試合は最後まで五分五分の勝負だった。

The match was an even contest right to the end.

手術が成功する確率は五分五分だそうだ。

They say the chances of the operation succeeding are fifty-fifty.

両チームの実力はほぼ五分五分だ。

The two teams are just about evenly matched.