To get a proper answer about a fund performnce you should calculate the IRR . This requires data about the price and date each unit was bought. The IRR is the rate of return which, if applied to each unit bought would equate the value of the gross investment to date with today's fund value. This can be accomplished in excel using the goal seek method.
I have a spreadsheet setup to fo it if you want to PM me with your email address, I don't think I can upload it here. But you need to have your pricing history.
It gives results that may surprise people as fund performance stats issued by investment managers only look at changes in fund prices between 2 dates - this takes no account of what price units were bought at between those dates - to say a fund has increased 20% over 10 years tells you nothing about the performance of the money you invested in the last 9 nine years.