A baseball player made six hits in nine innings.
Therefore, his ratio of hits to innings, which means his number of hits relative to the number of innings, is 6:9.
However, this isn't simplified. To simplify a ratio, we must find the GCF (Greatest Common Factor) of the two terms.
The GCF of 6 and 9 is 3, thus, we divide both of the terms by 3 to get our simplified answer.
6:9 = 6/3 : 9/3 = 2:3
Your answer is that the ratio of hits to innings for the baseball player is 2:3. (This can also be expressed as 2/3 or 2 to 3.)
Hope this helps! :)