Disable Entity rollup for specific % Accounts

We have percentage Accounts in FCCS, and their data is currently rolling up to the parent entity, which is not what we want. For example, the entity structure is:

Parent - ABC Consol

    Entity A (Base of ABC Consol)

    Entity B (Base of ABC Consol)

    Entity C (Base of ABC Consol)

Suppose we have the following entries:

Entity "A" - 50%

Entity "B" - 30%

Entity "C" - 40%

Right now, the system is rolling up to 120% at ABC Consol, which is not meaningful. We would like the system to keep the data at the base entity level and not roll it up to the parent ABC Consol.