Answer:
18 servings
Explanation:
You wrote "A recipe require 1/4 lb of onions to make servings of soup."
How many servings? Your problem is missing that information above.
Divide the weight of onions he has by the amount called for in the recipe.
(1 1/2 lb)/(1/4 lb) =
= (3/2 lb) / (1/4 lb
= 3/2 * 4/1
= 12/2
= 6
He has enough for 6 times the recipe.
It is unclear from your problem the number of servings one recipe makes, but whatever number of servings it makes, multiply that number by 6.
You wrote in a comment that a recipe makes 3 servings, so 6 times the recipe makes 18 servings.