Loan interest calculation method:
Interest = total repayment - principal = 20140 × 6-120000 = 840 yuan.
Loan interest rate calculation method:
Interest rate = interest/principal/time=840/120000/0.5=1.4%
The monthly loan interest rate is:< /p>
Monthly interest rate = monthly interest/principal = 140/120000 = 0.12%
Equivalent to interest of 1.2 cents.