I think doing it can improve because your in good health.
Katrina has 4 servings
<em><u>Solution:</u></em>
Katrina had 2/3 of a gallon of ice cream
She uses 1/6 gallon as a serving
Therefore,

<em><u>To find: Number of servings can be mad</u></em><em><u>e</u></em>

Substituting the values we get,

Thus Katrina has 4 servings