Four students were taking a final exam in math. Each checked their progress at different times during the exam.

Jake completed 1/6 of the exam in 1/5 of an hour. Mario completed 2/3 of the exam in 1/5 of an hour. Marcia completed 1/8 of the exam in 1/6 of an hour. Sara completed 1/10 of the exam in 1/8 of an hour.

Each student continued to work at the same rate for the entire exam. Which students finished the exam at the same time?