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

28% is the same as the decimal 0.28, which will be 28/100 as a fraction.

To simplify 28/100 you will have to find what number goes into both this will be 4.

So 28 : 4 = 7

100 : 4 = 25

So Elan will spend 28/100 or if you have simplified 7/25 of his workout on the treadmill.