During his workout, Elan spent 28% of the time on the treadmill. What fraction of his workout was on the treadmill?

A percent always mean something out of a 100. So, you write - 28/100. This ca be so pied further by 2. So, then the fractions becomes - 14/50. This cane further be simplified by 2, so the fraction is 7/25. And that is your final answer.