Create a percentage statistic from two questions


I am new to metabase and am wonder how to create one percentage statistic from two questions.

The questions come from different databases.

I have searched around and haven't found something that suits my needs.

For example 5 / 10 clients pay their bill is 50%. 5 and 10 come from different databases.


You’ll need to join the data under the same db, Metabase can’t still join data between different databases

Thanks so much!