How can i determine the benefits of training using the ROI formula benefit-cost/cost?

hello, please am training to calculate training return on investment but how can i determine the benefits of training using the ROI formula benefit-cost/cost?

Dear JONES JAPHET,
So many times the subject has come up for discussion. Scroll down and on the right side of the screen, you will find past threads on the subject. Earlier, I myself have given exhaustive reply. The link is as below:
https://www.citehr.com/523786-traini...oft-skill.html
Within this link there are further links. Go through all the links patiently and you will understand completely about the ROI on training.
Thanks,
Dinesh Divekar

Dear All
This is Maresh recently i was transfered to training & development function. plz help how to creat training calender and how to prepare of evaluation of training needs?am working pharma based company( osd ).