Answer:
36
Explanation:
To figure this out I divided 73 by two. I did this because 73 is an odd number so you are going to get a decimal. The two numbers are going to have to be the two numbers that decimal is in between.
73/2 = 36.5
The lower number is 36 and the higher number is 37.
to check: 36 + 37 = 73!!!
So the answer is 36
*Hope his helps!! : )*