Easy 7th Grade Math Problems With Answers - myilibrary.org Printable 7th Grade Math Worksheets - ThoughtCo Answer: 3/14 If students are struggling, explain that they can easily find the answer by multiplying fractions as follows, where "C" stands for the portion of cake that is left. They first need to determine how much cake was left after the birthday C = 7/7 - 4/7 C = 3/7