To find the rate of interest, we can use the simple interest formula:
Interest = Principal * Rate * Time
In this case, the principal (P) is 6,000 birr, the time (T) is 5 months, and the amount owed (A) is 7,500 birr. We need to find the rate (R).
Interest = Amount Owed - Principal
Let's substitute the values into the formula:
Interest = 7,500 - 6,000
Interest = 1,500 birr
Now we can rearrange the formula to solve for the rate:
Rate = Interest / (Principal * Time)
Rate = 1,500 / (6,000 * 5/12)
Rate = 1,500 / (30,000/12)
Rate = 1,500 * 12 / 30,000
Rate = 0.6 or 0.6 * 100 = 60%
Therefore, the rate of interest for the loan is 60%.