A stock had returns of 2.2 percent, 2.6 percent, -8.4 percent, -3.9 percent, 3.5 percent, and -4.4 percent over the past six years. What is the arithmetic average return for this time period? _____%

Instruction: Enter your response as a percentage with two decimal places.

For example, if your answer is 0.1213=12.13%, please only enter "12.13", please do not enter "0.1213" or "12.13%", the system may not recognize the % sign. You may put negative signs if necessary,