Resume Question

I have been completing my resume to begin a job search. I have a question though. I am working two jobs here at my present company. I have each job broken down with tasks performed under each. I need to show what percentage I work each job. What is the best way to do this?

Job 1 – X% (Year Started – Present)

Job 2 – Y% (Different Year Started – Present)

Something like that or should it be in the area where all tasks are listed?

Thank you in advance for any help.

Brad