Answer :
You want half of the recipe, so you want half of 3/4 of a cup.
Multiply 3/4 by 1/2 cup.
3/4×1/2=3/8 cup.
You should use 3/8 cup of milk.
Multiply 3/4 by 1/2 cup.
3/4×1/2=3/8 cup.
You should use 3/8 cup of milk.