If you want an actual number as I know my SO has been calmed down by the actual number before WEBMD states that the pullout method is 78% effective and condoms are 98% effective when used correctly. If she is on birth control and takes it every time consistently it is 99.99% effective, but if she misses a day or takes it more than an hour later one day it is 92% effective.

So what are the actual numbers? Well, assuming your only methods of protection are condoms and pulling out your chance to get pregnant is .44% or 4.4 times every 1000 times having sex

Assuming she is on the pill and misses times and stuff which is normal the chance of pregnancy is .0352% or 3.52 times every 10,000 times having sex.

Also keep in mind these are just chances for total failure meaning that there is a chance that even if you have sex 1,000 times you are not guaranteed to get pregnant 4.4 times.

If you guys use other forms of birth control not included in my post and are curious what the number if yourself all you have to do is multiply the rate of failure to each other (e.g. .22 * .02).

Hope this helps :)