percentage Dont now

X1 20 -9

X2 50 -9

X3 - -9

Total 70

If X3 does not know ' Total can be 100 different, go to next variable

example 2:

percentage Dont now

X1 20 -9

X2 50 -9

X3 30 -9

Total 100

I don't know in any of them otherwise there should be 100 total,go to next variable