Respuesta :

Answer:

0.35%

Step-by-step explanation:

T = 18 months = 1.5 years

SI = P × R × T

26.25 = 500 × R/100 × 1.5

R = 26.25 × 100 / (500 × 15) = 5.25/15 = 0.35 % annually

The answer is 0.35%