Final answer:
To calculate the percentage gain on an investment, subtract the initial value from the ending value, divide it by the initial value, and multiply by 100. In this case, the percentage gain is approximately 14.913%.
Step-by-step explanation:
To calculate the percentage gain on an investment, you can use the formula: (Ending value - Initial value) / Initial value * 100. In this case, the initial value is $2300 and the ending value is $2643. Plugging these values into the formula, we get: (2643 - 2300) / 2300 * 100 = 14.913%. Therefore, your percentage gain on the investment is approximately 14.913%.