Tenants in common question

[Patrick Thomas Dickinson]

HI bigger pockets folks,

I have a quick question. Me and my girlfriend are purchasing a sfh or multifamily property in the near future. I will be putting down the downpayment of 20 to 25% because it an investment property and we will be splitting the loan amount 50/50. So it would look something like this. 

Purchase price 700000$ 

downpayment 140000$ - my responsiblity 

closing costs 15000$ my responsibility 

275,000K loan her responsiblilty 

275,000k Loan my responsibility 

I am trying to figure what a contract might look like for me and her as far as terms, does anyone have any experience in a similar situation, how the equity would be split upon sale or any other feedback. I believe the title would read tenants in common just trying to determine what percentages we might use 60/40, 70/30 etc