The Custom Fields Calculator supports Deal, Person, and Organization.

The Custom Fields Calculator supports Numerical and Monetary field types.

There are two factors contributing to such an outcome.
First, we process calculation requests one-by-one, meaning if you send two calculation requests one after another, we will take the second one into the job only when the first one finishes.
Second, Pipedrive does not immediately display the changes made in the background. Sometimes Pipedrive doesn't show the changes at all and page reload might be needed.

When we encounter a deal, a person, or an organization that doesn't have one of the fields required for the formula, we skip such an entity.

There is! Just type the new field's name into the

Write result to:

dropdown.
Click on the suggestion to create a new field right away. The created field will be of the Numerical type.

Unfortunately, there's no way to undo calculations at the moment, but we are on it!

The percent symbol is not supported. However, to get a percentage of a particular value, you can divide it by 100 and multiply by the number of percents you need.
For instance, to get 20% of the field Value, try the following formula:

Value * 0.2

.

Please make sure you are using the same email address you use with Pipedrive to create your CFC account. You can find your Pipedrive email here