Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

How to share income after marriage and kids?
What equal percentage of both you and your girlfriend's income will cover the essential household expenses? Although we earned different amounts, both of us turned over half our income over to the household.  Between us this percentage slice from each of our earnings neatly covered all the essentials.  The amounts contributed were different, but the contributions where nonetheless equal. Beyond this the financial relationship was fast and loose.