I usually just pay what I owe and a 15 - 20% tip. Occasionally, and it depends on the acquaintances/friends. I am with, I will do equal split (total + tip) / nu

I usually just pay what I owe and a 15 - 20% tip. Occasionally, and it depends on the acquaintances/friends. I am with, I will do equal split (total + tip) / number of people. Is this really that difficult?