Thank you for the suggestions, but the pipelines for Silver Stained comets and fluorescent stained comets are different. In the prior one, there is a direct output value for %tail DNA whereas in the later, its otherwise. Fluorescent comets have indirect values that can be correlated as %tail DNA but journal reviewers would expect direct values.
I am not good at programming, so am unaware of a way to create a Calculate module that can do the job.
Thank you anyways