A recipe for a particular cookie calls for 1 2/5

cups of sugar. If you are tripling the​ recipe, how much sugar do you​ need

What operation must be performed to determine how much sugar you​ need?

To determine how much sugar you need when tripling the recipe, you must multiply the amount of sugar needed by 3.

1 2/5 cups * 3 = 3 6/5 * 3 = 18/5 * 3 = 54/5 = 10 4/5 cups

Therefore, you will need 10 4/5 cups of sugar when tripling the recipe.