There are 5 oranges and 11 strawberries for 4 person,
then for 1 person,
[tex]\frac{5}{4}\text{ and }\frac{11}{4}[/tex][tex]1.25\text{ oranges and }2.75\text{ strawberries}[/tex]Then for 2 people,
[tex]1.25\times2\text{ and 2.75}\times2[/tex][tex]2.5\text{ oranges and }5.5\text{ strawberries}[/tex]Hence for 2 people the fruit salad receipe needs 2.5 oranges and 5.5 strawberries.