Vanita and Trevor gave you good answers, just a note of followup. Be
careful with the concepts of "% Complete" and IMHO you should never ask a
resource for such a number - they probably don't have a clue what you're
really asking them. There are really three different percentages and
they're not equivalent, you can't mix and match them. There's "% Complete"
which refers strictly to duration - at 8 days into a task that lasts 10 days
you're 80% complete even if you haven't achieved a darned thing. There's "%
Work Complete" which refers to man-hours expended versus man-hours required.
And then there's "Physical % Complete" which is a usually subjective
estimate of the % of the required deliverable that has been created.
How could % Complete and % Work Complete be different? I'm painting a room.
Mon I do an hour of a first primer coat and let it dry overnight. Tue I do
a second primer, also taking and hour. Wed I do the first colour coat,
takes an hour. Thu I do the second colour coat, taking an hour. Then on
Fri I spend all day doing all the detail work and cleanup. The task
duration is 5 days. The work is 12 man-hours. It's Thu at 4pm and
everything is on schedule. I've crossed over 32 hours of the 40 required,
we're 80% complete. We've done 4 out of the total 12 hours work required -
we're at 33% Work Complete. And we look around the room and only 2 walls
have the final coat of paint. We're 50% physical complete. Always compare
apples to apples.