Data Connection for calculated fields

[PhilippSaenger]

I would like to get are scorecard in looker studio. This Scorcard should present the dividend of two values. The only problem is those two values are not in the same dataset. I tried to create a blend of the two datasets but then i can not create a calculated field. Those anyone know how to do this?

[PhilippSaenger]

I figured it out myself the problem was that i had some dimensions selcted in my blend. If anyone wants to do this select crossslection and no demensions than it will work