If you have used Data>Subtotals then click on 2 to show only the Subtotals
1) Be sure that the active cell is in the data range
2) Press Ctrl * to select all data or use F5>Special>Current region>OK
3) Press Alt ; to select all visible data or use F5>Special>Visible cells only>OK
4) Ctrl c or Edit>Copy
5) Insert>Worksheet
6) Ctrl v or Edit>Paste
7) Select the sheet with the Subtotals
8) Press Esc