Question

Sammy has a recipe that needs 3/4 teaspoon of salt for every 2 cups of flour. if Sammy increases the amount of flour to 5 cups of flour, how many teaspoons of salt are needed? explain

Answer 1

$\text{Sammy has a recipe that needs 3/4 teaspoon of salt for every 2 cups of flour.}\\ \text{we nee to find the number of teaspoons of salt needed if Sammy increases}\\ \text{the amount of flour to 5 cups.}\\ \text{so we use the proportion for that.}\\ \\ \text{for 2 cups of flour, the amount of salt needed}=\frac{3}{4} \text{ teaspoons}\\ \\ \text{so for 1 cup of flour, the amount of salt needed}=\frac{(3/4)}{2}=\frac{3}{8} \text{ teaspoons}$

$\text{Therefore for 5 cups of flour, the amount of salt needed} =\frac{3}{8}\times 5\\ \\ =\frac{15}{8} \text{ teaspoon}$

Hence, Sammy will have to increase the salt to 15/8 teaspoons.