To find half of 3/4 cup, you need to multiply it by 1/2. This will give you 3/4 × 1/2 = 3/8 cup. Yes, it's that simple, and you don't need a Ph.D. in math to figure it out.
But, if you're still confused, think of it like this: if you have 3/4 cup of coffee, and you want to share it with your friend, you'll both get 3/8 cup each. It's like sharing a cup of coffee, but without the awkward small talk.