[1] http://blog.eladgil.com/2017/08/unequal-cofounders.html
[2] https://blog.ycombinator.com/splitting-equity-among-founders/
[3] https://news.ycombinator.com/item?id=17371345
https://www.andrew.cmu.edu/user/fd0n/35%20Founders'%20Pie%20...
In particular you can fill it out yourself and ask your partner to fill it out, then compare notes. This will give you a subject to discuss and see if you can align your expectations. If you come to an agreement +/- some margin then you have your answer, if you don't it's something you want to know sooner rather than later.