You should always ask, and they should always tell you.

Depending on the position, you may also want a look at the cap table but more often just the summary or even current %age.

Part of the reason people don't do this by default is that it's dynamic. I can promise you 100k shares today and that's what happens 3 mo from now when you start, but hiring anyone else (or you for that matter) will change the %age number.

By the way, especially early on a primary reason you should ask isn't to value the equity but to get a better idea of how the offer values you....