Question

Based on her receipt Elena knows that seven servings of cereal have 1120 cal if she wants to eat 140 cal of cereal how many servings should she eat

Answer 1

We want to find out how many calories are in a serving so, 1120/7 = 160.
A single serving has 160 calories.
140 calories would be 140/160 = 87.5% of a serving or less than a serving.