Hyperinflation

Grabber, Money, Resin and Powder | 64 x 64 x 36 cm 

Figures from November 2008 estimated Zimbabwe's annual inflation rate at 89.7 sextillion percent. By December 2008, annual inflationwas estimated at 6.5 quindecillion novemdecillion percent. Here's another way of putting it:

64,000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 %

On 27 November 2007, the chief statistician of the Central Statistical Office of Zimbabwe, Moffat Nyoni, announced that it would be impossible to calculate the inflation rate of the Zim dollar any further. This was due to the lack of availability of basic goods, and subsequent lack of information from which to calculate the inflation rate; plus, locally available computers had an insufficient number of digits and software to perform the calculation.

Source: Wikipedia