We have found one software suitable in our database for this conversion.
It seems that the only way how to convert XLSX spreadsheets as iWork Pages documennts (*.pages) would be to use some of the available online conversion services like ZAMZAR. What the service does, is to probably just pasting the tables from XLSX as pictures or tables in pages document. Far from perfect but may work.
The other way would be to use Office for Mac and somehow copy the data from XLSX to iWorks Pages.
XLSX
Files with xlsx extension are s used by Microsoft Excel for its workbooks (spreadsheets) in Office Open XML format. XLSX is the latest spreadsheet format used by Excel with the adoption of XML formatting first used in Office 2007. While older xls files were in proprietary binary file format, xlsx spreadsheets use a somewhat altered XML scheme.
PAGES
pages file extension is used for default document format of Pages, a word processor and page layout program from Apple. No other program can open the .pages files, but Pages is able to export its documents to some other formats, such as PDF or Microsoft Word's .docx.