20 C.F.R. § 404.342 Mother's and father's benefit amounts.
Title 20 - Employees' Benefits
Your mother's or father's monthly benefit is equal to 75 percent of the insured person's primary insurance amount. The amount of your monthly benefit may change as explained in §404.304.
Title 20: Employees' Benefits
PART 404—FEDERAL OLD-AGE, SURVIVORS AND DISABILITY INSURANCE (1950– )
Subpart D—Old-Age, Disability, Dependents' and Survivors' Insurance Benefits; Period of Disability
Benefits for Spouses and Divorced Spouses
§ 404.342 Mother's and father's benefit amounts.