To find 1/2 of 1 3/4, we first need to convert the mixed number into an improper fraction. 1 3/4 is the same as 1 + 3/4, which can be converted as follows:
1 = 4/4, so 1 3/4 = 4/4 + 3/4 = 7/4.
Now, we need to find 1/2 of 7/4. To do this, we multiply 7/4 by 1/2:
(7/4) * (1/2) = 7/(4 * 2) = 7/8.
So, 1/2 of 1 3/4 is 7/8.