For the life of me I'm unable to locate a way to calculate this issue.. I'm trying to take the average of 3 numbers, however each number has more or less weight on the total average than the other 2 numbers.. For example.

(Number 1) 50% total weight

(Number 2) 37.5% total weight

(Number 3) 12.5% total weight

All equaling 1 total average. Any help would be appreciated. Thank you!