Answer:
[tex] \frac{1}{2} \: cups[/tex]
Step-by-step explanation:
Butter required for one recipe of cookies
[tex]= \frac{2}{3} [/tex] cup
Therefore,
Butter required for [tex] \frac{3}{4} [/tex] recipe of cookies
[tex]= \frac{3}{4} \times \frac{2}{3}\\\\
= \frac{1}{2} \times \frac{1}{1}\\\\
= \frac{1}{2} \: cups[/tex]
