Help with interactive charting (percentage and general format of data or numbers)

The data labels will reflect the number format of the range. How you have it set up currently there is only 1 number format in use.

Start by adding 2 rows of formula to the calc sheet so you have a set of data with a row for each KPI.
Format each row of data with correct number format.

Use the name manager to Define that data
ALL_DATASETS: =calc!$B$14:$M$16

Define another range to reference the currently selected KPI

USE_DATASET: =INDEX(ALL_DATASETS,MATCH(calc!$A$13,REF!$H$2:$H$4,0),0)

Now on the chart checked the number format of the data labels so it is linked to the cells.
Edit the series formula

=SERIES(,calc!$B$13:$M$13,'1371411.xlsx'!USE_DATASET,1)