Hi everyone, I was previously an intern with a securities firm, and is now trying to add this experience into my CV.

During my internship I did 30% of my supervisor's work and so reduced 30% of her workload.

I wrote in my CV, "Replaced over 30% of equivalent workload of supervisor daily in brokerage activities",

but I just feel that it doesn't sound right. How should I change it? (grammatically and in terms of style)

Thanks!!

Jacky