Rayan invested money at two simple interest rates: 6% per annum and 7% per annum. If the interest earned from both investments is the same, what is the ratio of the amounts invested at these two rates?

Explanation

Let the amount invested at 6% be x and at 7% be y. Since the interests are equal, we have: x × 6 × t / 100 = y × 7 × t / 100. Simplifying, x / y = 7 / 6. Therefore, the ratio of investments is 7 : 6.