Answer:
short term investment is any asset you hold for one year or less. Most investors hold short term investments for no more than a few months at a time, if not several weeks. A long term investment is any asset you hold for more than one year.
I believe the answer is: naturalistic observation
Naturalistic observation is being done without any form of variable manipulation from the researchers. The purpose of such observation is to make the result of the study represent the actual condition as close as possible. Usually only applicable for qualitative data.
To calculate the percentage increase: First: work out the difference (increase) between the two numbers you are comparing. Then: divide the increase by the original number and multiply the answer by 100. If your answer is a negative number then this is a percentage decrease.