Final answer:
To determine the amount of each ingredient to serve 10 people instead of 8, the expression (10p/4) can be used.
Step-by-step explanation:
To determine the amount of each ingredient to serve 10 people instead of 8, we can define a variable. Let p be the number of people. Since the recipe serves 4 people, we can write the expression to determine the amount of each ingredient as (10p/4).