I'm not sure how I'm getting my answer.

Question

There are 8 members in a club on the 8th day every member calls and talks to every other member that day by phone how many conversations occur

Answer 1

A long explanation,

Person 1 makes 7 calls and is done.

Person 2 makes 6 calls and is done

Person 3 makes 5 calls and is done

Person 4 makes 4 calls and is done.

Now complete the pattern and add/answer.