The exchange rate of a stock option decreased on one day by 15.8% . The next day, the same stock increased by 15.8%. What is the total percentual change over these two days? Round your answer to two decimals places. The total percentual change = Number % For instance: If it is an increase of 2.321 %, provide 2.32 as your answer. If it is an decrease of 3.432%, provide -3.43 as your answer. When there is no change, provide a 0 (zero). Hint Penalty