how can i convert 77.777777.. to 77.78 through xsl

hi
i m calculating percentages and getting the result with 16 decimal digits .
How can i trim those digits with xsl

example code

<xsl:variable name="percentclassesattended" select="$classesattended*100 div $totalclasses" />

<xsl:value-of select="$percentclassesattended" />

output : 77.7777777777777777 (say)

if any one knows plz help me.
thanx

wasif

There is a round function, but it only rounds to the integer, so you need to take your 77.77777 multiply by 100 to give you 7777.777, then round(), then divide by 100 to give you 77.78.

Cul

Thanx a lot Culland
The round () function worked.

Regards
Wasif