RE: 1/2 ??????????
A deer born in may & Killed in November. How long was it alive? 6 months.
6 months is a Half year.
Add one for each additional year it lives. Deer killed in hunting seasons are “X” yr & a halfs.
You get some variations a month or 2 either way, but for the majority its easier to say 1.5, 2.5 etc for hte deer's age.