That is such a strange question. What do you mean? This is my best guess for an answer, which may or may not answer your question:
120% Eidolons (Cerberus, Leviathan, Hanuman, Nidhoggr) have 100% base, and gain 4% per same-element Eidolon equipped. If limit broken, this increases to 105% base. Come December, they'll be buffed to gain 8% per same-element Eidolon equipped.
Notice that this is different from Anubis and Managarm. They are 80% base, and gain 4%(+1% per Limit Break). So if you have no Dark Eidolons equipped, a 120% Anubis will be 80%.