1/2 of 5 less than 10

2.5

Step-by-step explanation:

Lets start off with:

1/2 means half or 50% of a number.

5 less than ten would just mean to subtract 5 from ten.

10-5=5

Then, 1/2 or 50% of 5 would be 2.5

5/2=2.5