KPI Visualisation problems with %

I have problems to create a dashboard in PowerBi to show my KPIs.

First problem i had was to take data from spreadsheet filtered by month and show it in visual. I am not using vast amount of data but already calculated KPIs. 

But table below doesnt work : 

       jan    feb    mar

A    95%   90%  90 %

B    80%   85%  85%

C    75%   80%  90%

I needed to split this table into individual rows as below : 

A 95% jan

A 90% feb

A 90% mar

B 80% jan

B 85% feb 

B 85% mar

C 75% jan

C 80% feb

C 90% mar

This could be pain to update every month but its doable. 

Second problem is to show the % in a pie chart as I want. I set up the modelling and query as % and decimal. But doesnt work if i want to show in pie chart. Is there a simple way how to show a % e.g. A = 95 % to show it in pie chart ? If I add column with difference 100% - A = 5%  

A 95% 5% jan

Is this really the solution to show the KPI ? As I already have the KPI calculated I dont want to calculate a new column everytime I am updating this.

thank you for your help