To force Excel to print your spreadsheet on one page do this:
1. Whilst you have the spreadsheet open click the (Print Preview) button
2. Now click the button
3. Make sure you have selected the Page Tab and type a number 1 in Fit to: page wide and tall like this...
4. Click the button then the button
Note: After saving your workbook the spreadsheet will also 'remember' to print on one page.