Answer: 1%
Step-by-step explanation:
The amount that the Mutual fund will be taxed on is the 1% of Net Investment income that will be remaining. This is because the distributed income will be taxed from the shareholders and so does not need to be taxed from the mutual fund in order to avoid double taxation.
The 99% that was distributed will then be taxed based on what type of income it is i.e dividend income, capital gains etc.