Investment advisory services expense incurred for managing your portfolio, are deductible investment expenses. There are no percentage standards for these type of expenses;
Educational expenses related to obtaining a general education in the areas of managing and making investments, not specifically related to managing your portfolio, but rather providing an education in a wide variety of investment topics, would not be deductible any more that higher education expenses (for example an education in business with a "finance" major) that you would take with the objective of being able to manage your own portfolio, which would not be deductible.
Including these educational type of expenses in "investment expenses" deductible under IRC 212, is very risky and runs the very real possibility of disallowance as well as provide a "red flag" to the IRS as the IRC 212 expenses would initially be compared to your investment income, not your investment portfolio as the investments themselves are not disclosed anywhere on your tax return
Investment seminars, conventions & similar meetings that you attend for the purpose of assisting you to manage your investments, are specifically disallowed as investment expenses. Although this may not seem reasonable, this is another example of what happens when deductions
are abused. Certain taxpayers were deducting all sorts of expenses in this category, investment cruises, attendance at offshore investment seminars in the Carribean, and on & on; so, now none of these expenses are deductible.