1. Generate a new Pivot Report
  2. Click on the 'Calculated totals and fields' button at the top (icon looks like a calculator)
  3. Select Create Calculated Total...
  4. On the Calculation tab, remove the "0"
  5. In the Insert Reference To field, select Total Gift Amount (Total)
  6. Click the Insert Reference To button--This will create a duplicate total column
  7. Click Change
  8. Close the Commands and Options window
  9. Highlight the duplicate column
  10. Click the Show As field (icon shows as '%') and select Percent of Column Total