I am getting conflicting (and confusing) results using the IRR and NPV
functions
in Excel. Here is the cashflow data for each year:

Year 1: (2,057)
Year 2: 155,849
Year 3: 333,756
Year 4: 459,403
Year 5: 592,126
Year 6: 725,751
Year 7: 860,094
Year 8: 976,671
Year 9: 1,036,326
Year 10: 5,247,233

When I compute the IRR I come up with 7688%. However, knowing that the
IRR should be the interest rate which makes the NPV = 0, when I use the NPV
calculation I should be using 76.88%, not 7688%. Therefore, I am assuming
I must divide the IRR result by 100 to get an appropriate IRR. Is this
correct?
Thanks for anyone's assistance.