Haskell: Force floats to have two decimals

Question

Using the following code snippet:

(fromIntegral 100)/10.00

Using the Haskell '98 standard prelude, how do I represent the result with two decimals?

Thanks.

user_163498 · Answer

Just for the record:

import Numeric 
formatFloatN floatNum numOfDecimals = showFFloat (Just numOfDecimals) floatNum ""