Given
3/4 cup serving of cereal provides 100% of vitamin B6 requirement
The percentage of daily value that would be available in 1/2 of a cup of cereal is:
[tex]\begin{gathered} \text{= }\frac{\frac{1}{2}}{\frac{3}{4}}\text{ }\times\text{ 100 \%} \\ =\text{ }\frac{1}{2}\times\frac{4}{3}\text{ }\times\text{ 100\%} \\ \text{= }\frac{4}{6}\text{ }\times\text{ 100\%} \\ =\text{ 66.67\%} \end{gathered}[/tex]Hence, the percentage of the daily value in 1/2 of a cup is 66.67%