Calculation formula for pecentage of task complete by start date and end date

Novice user - I have found the formula below. is "Start Date Actual" the name of the column and is "row" something I need to change? Using 3 columns; Start Date, End Date and % Complete, what changes do I need to make on the formula below? I am also getting "Unparseable" and do not understand what to change. Thank you so much.

=IF([Start Date Actual]@row > TODAY(), 0, IF([End Date Actual]@row < TODAY(), 1, (NETWORKDAYS([Start Date Actual]@row, TODAY()) / NETWORKDAYS([Start Date Actual]@row, [End Date Actual]@row))))

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As a project manager, trying to automate % complete solely around dates is very tricky. I will rely on the individuals that are assigned the tasks to dictate their % complete once they have started their task. It can also make for a complicated and potentially inaccurate picture when basing % complete off of dates. What I've learned to leverage is having a start & end date, a % complete column, a status column (single select drop down type not restricted), and a risk column (checkbox property type). For both Status and Risk, I have locked w/ the below column formulas. That way I'm only adjusting dates & % complete and I can filter reports or add conditional formatting based on status & risk.

Status formula: =IF([% Complete]@row = 0, "Not Started", IF([% Complete]@row < 1, "In Progress", "Complete"))

Risk formula: =IF(AND([End Date]@row < TODAY(), NOT(Status@row = "Complete")), 1, 0)

Hope that makes sense!!

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Hi Carolyn, yes, you'll need to change the column names in the formula to match your actual column names. if your column names have spaces or numbers, you'll need to wrap them in [ ] in the formula. Like...

=IF([Start Date]@row > TODAY(), 0, IF([End Date]@row < TODAY(), 1, (NETWORKDAYS([Start Date]@row, TODAY()) / NETWORKDAYS([Start Date]@row, [End Date]@row))))

Ryan Sides