We are given in the question that 3 oz. of sugar is contained in 10 oz. of cereal.
To find the amount of sugar in 25 oz. of cereal, we first calculate the amount of sugar per ounce:
[tex]\Rightarrow\frac{3}{10}\text{ oz. of sugar per oz. of cereal}[/tex]Therefore, the oz. of sugar in 25 oz. of cereal is gotten by multiplying as shown below:
[tex]\Rightarrow\frac{3}{10}\times25=7.5\text{ oz. of sugar}[/tex]Therefore, there is 7.5 oz. of sugar in 25 oz. of cereal.