Final answer:
Employees' portions of FICA tax liabilities are paid through payroll deductions, with 6.2% for Social Security and 1.45% for Medicare.
Step-by-step explanation:
Employees' portions of FICA tax liabilities are paid through payroll deductions. These deductions are taken directly from the employee's paycheck by the employer. The amount deducted includes 6.2% of the employee's wages for Social Security and 1.45% for Medicare.