2/3
1) To find that out, we need to divide that 1/2 cup serving by 3/4 cup of a yogurt
[tex]\frac{\frac{1}{2}}{\frac{3}{4}}=\frac{1}{2}\times\frac{4}{3}=\frac{4}{6}\text{ =}\frac{2}{3}[/tex]When dividing fractions multiply the first by the reciprocate of the second one.
2) So, simplifying that 4/6 of the whole we can write
In a 3/4 cup of yogurt, there is 2/3 of 1/2 cup.