Thomas is making hummus. One of the ingredients in a hummus recipe is chickpeas. For one serving of hummus, the recipe calls for 1 cup of chickpeas. In a can of chickpeas, there are 16 ounces of chickpeas. In one cup of chickpeas, there are 6 ounces. To make 20 servings, how many cans of chickpeas should Thomas buy? Let's think first. Chain of thought:
For 20 servings, Thomas needs 20 * 1 = 20 cups of chickpeas. To have 20 cups, Thomas needs 20 * 6 = 120 ounces. 120 ounces / 16 ounces = 7.5 cans of chickpeas. Since Thomas cannot buy half a can, he needs to buy 8 cans.
Therefore, the answer is 8.