What number is half way between 15 and 37

First, let's calculate the distance between the two:

37-15=22.

so the two numbers are 22 numbers apart.

half of this distance is 22/2=11.

so the middle of 15 and 37 is at 15+11=26 or 37-11=26.

so the answer is 26!

(15 + 37) : 2 = 52:2 = 26.