Forgot password to open Excel sheet

The Microsoft Excel LOOKUP function returns a value from a range (one row or one column) or from an array. ... It can be used as a worksheet function(WS) in Excel. As a worksheet function, the LOOKUP function can be entered as part of a formula in a cell of a worksheet.. more

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If you mean that you can open the Workbook and read the Worksheet - then all you have to do is select all and paste it to another Worksheet. This will allow for changes of formulas etc.

If you mean the whole Workbook - then I dunno.

In future, either use the same password for everything (easy to remember) or Protect the work with nothing entered into the password field (leave this blank). This last will protect the work from people who try to guess your password, but will be easy for you to remember - eg every password is left blank.

If you must use unique passwords, then keep a record of them somewhere other than on your computer.

Sorry I can't help with the "Workbook" solution - but somebody else out ther may be able to do so.