14. Find the fraction of work done by a person

Joseph's teacher gave his a project to be completed by Sunday. He finished \((13 / 55)\) part of his work by Friday and \((30 / 55)\) part of his work by Saturday. What fraction of work he has to finish by Sunday to complete the project?

 

Joseph has to do $\frac{i}{i}$ of the work to complete the project.

[Note: Submit the fraction without simplifying it]