Joint business owners - balancing workload

[Undirection]

How do you manage this? I work in a business with my business partner who also has other business interests. I look after the operational stuff which means all the day to day customer and operational teams management. He does mostly the rest which includes keeping an eye on the finances, managing online marketing and update (some to the site). It sounds fair but tbh his bit is about 10% of mine but I am not sure how to balance it better and what to suggest. I feel I am running and driving the business and he is just keeping an eye on it.