# Percentage Expected vs Percentage Completed

• ### Question

• I have the expected percentage in a custom field, but I have differences with the percentage completed at the level of summary tasks. Anyone know how to fix it?

Greetings.

Alex.
Tuesday, April 18, 2017 4:58 PM

### All replies

• Alex,

So how are you calculating "expected percentage" in your custom field?

When you say you have differences, what are the "differences" between?

It's kind of hard to "fix something" if we don't have enough information to understand the issue.

John

Wednesday, April 19, 2017 1:59 AM

expected percentage:

IIf([Current Date]>[Baseline Finish],"100",IIf([Current Date]<[Baseline Start],"0",ProjDateDiff([Baseline Start],[Current Date],[Calendar])/[Baseline Duration]*100))

The differences are: When the tasks are completed at 100 percent, as expected, the task summary  values are not same.

See image below:

﻿Regards,

Alex

Friday, April 21, 2017 7:02 PM
• Alex,

There isn't quite enough information provided to give a definitive answer (i.e. what is your calendar, what is the "current date"), but generally this is how Project computes percent complete for summary lines.

Summary line % complete = sum(actual durations of all subtasks)/sum(durations of all subtasks)*100%

In other words, it is a weighted average. Does that help?

John

Saturday, April 22, 2017 2:11 AM