For this case we must raise a rule three:
1 recipe ----------------------->[tex]\frac {2} {3}[/tex] butter
[tex]\frac {1} {4}[/tex]recipe -------> x
Where the variable "x" represents the amount of butter that requires a quarter of the cookie recipe.
[tex]x = \frac {\frac {1} {4} * \frac {2} {3}} {1}\\x = \frac {2} {12} = \frac {1} {6}[/tex]
So, Anna requires[tex]\frac {1} {6}[/tex] cup of butter
ANswer:
[tex]\frac {1} {6}[/tex]
