How get value from first cell and last cell for each row

Hi everybody,

I have a problem with the next tablix. I need get the first cell value and the last cell value from all the rows for get the percent

for example:

FirstCell.Value / LastCell.Value = %

I don't have any idea to do this. Maybe somebody could help me.

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José Carlos Barba Gutierrez
Lima - Perú
Saludos
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