Total number of Delegates to be in Denver: 4048
Pledged: 3253
Unpledged (aka super): 795

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Obama pledged delegates: 1599
Obama superdelegates: 286
Total Obama Delegates: 1885

Clinton pledged delegates: 1446
Clinton superdelegates: 276
Total Clinton Delegates: 1722

Edwards pledged delegates: 18
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Number of Delegates remaining: 423
Pledged: 190
Unpledged: 233

Remaining Pledged Contests:
Kentucky - 51
Montana - 16
Oregon - 52
Puerto Rico - 55
South Dakota - 15

Unknown: 1 from a territory

Amount Clinton has to win to catch Obama in pledged delegates: 91%
1599-1446=153 Obama-Clinton to get difference
190-153=37 take the delegates remaining and subtract the difference
37*50%=19 half the delegates Clinton needs of the remaining to stay even
153+19=172 half the remaining plus the difference needed to catch Obama combined
172/190= 91%