Final answer:
To find the total amount of salt and vanilla required, add the fractions 3/8 tablespoons and 1/4 tablespoons together. The result is 5/8 tablespoons.
Step-by-step explanation:
To find the total amount of salt and vanilla required, we need to add the fractions 3/8 tablespoons and 1/4 tablespoons together. To do this, we need a common denominator. The least common multiple of 8 and 4 is 8, so we can rewrite the fractions as 3/8 and 2/8. Adding these fractions together gives us a total of 5/8 tablespoons. Therefore, we need 5/8 tablespoons of salt and vanilla.