In my understanding the context is WPM.

Work Performance Information (WPI) is the performance actual/raw data.

Work Performance Measurement (WPM) is the comparison data between actual vs. planned.

Performance Reports summarizes the information from WPI and WPM and presents them as required by the stakeholders.

>> For Point 2, since you are comparing the data, its WPM.

1. I have competed 10 floors of a building- for me this a WPI ---- Yes it is WPI
   
2. I am supposed to complete 100 floors when the project completes - thus i am 10% complete is this WPI or WPM?---- When based on WPI, variance analysis is measued, it becomes, WPM, hence it is WPM.
   
3. As planned in should have completed 30 floors by today so compared to the planned have completed 33 % of the planned work - this is a WPM _ YES
   
4. My variance is 66% or 20 floors, this is a variance. - Variance is difference, it may be %age or in a Magnitude.---hence it is both
   
5. So i am lost with point 2 the 10% completeor the status is it WPI or WPM --- It is WPM

WPI - raw data, information , in routine

WPM - based on WPI, some standarized parameters or values like - PV, CV , EV, CPI etc.

Performance Reports- which comprises above WPM

WPI -------> WPM ----------> PR

See -10.5.1.2 and 10.5.1.3 and 7.3.3.1 and 10.3.1.2

Its my conclution, hope you will get it.

Regards