Determine the accurate answer of the following question
Question- Assuming a normal distribution, 34.13 percent of all outcomes are within one standard deviation above the mean. If the portion of the distribution between one and two standard deviations above the mean contains 13.59 percent of all outcomes.
Part 1- What percentage is contained in the area between the mean and two deviations below the mean?
I need help to find the percentage is contained in the area.