Answer:
260%
Step-by-step explanation:
Initial principal (P) = 270
Final payment (f): 303.15
Interest paid: 303.15 - 270 = 33.15
interest rate (r) : annual rate
Time (t): 27 days = 17/360 years
Interest: 270 * r - t = 270 * r * 17/360 = 33.15
r = (33.15 * 360) / (270 * 17) = 2.6 i.e. 260%
check: F = P (1+rt) = 270 (1 + 2.6 * 17/360) = 303.149 ≈ 303.15
