Convert Xslt 1.0 String to a Number - xslt-1.0

Question

Is necessary for me convert this data:
Longitude 8-55,810 into Longitude 8.93016666
This transformation is obtained :
8 is the integer part and remains untouched;
the second part after '.' is obtained dividend 55,810 by 60
In xslt 1.0 I:
<!-- Declared a variable longitudine es. 8-55,810-->
<xsl:variable name="lon" select='LONGITUDE'/>
<!-- I put in a variable the part after '-' es. 55.810 -->
<xsl:variable name="partemobilelon" select="substring-after($lon,'-')"/>
Now is necessary for me Convert '55.810'(is String) to Number and Divide by 60 (only 8 character after ',').

Answer 1

See if this helps:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:variable name="longitude" select="'8-55,810'" />
<xsl:template match="/">
<output>
<xsl:param name="int" select="substring-before($longitude, '-')" />
<xsl:param name="dec" select="translate(substring-after($longitude, '-'), ',', '.')"/>
<xsl:value-of select="$int + $dec div 60" />
</output>
</xsl:template>
</xsl:stylesheet>
Edit:
To round the result, try:
<xsl:template match="/">
<output>
<xsl:param name="int" select="substring-before($longitude, '-')" />
<xsl:param name="dec" select="translate(substring-after($longitude, '-'), ',', '.')"/>
<xsl:param name="num" select="$int + $dec div 60" />
<xsl:value-of select="round($num * 100000000) div 100000000" />
</output>
</xsl:template>
or just:
<xsl:template match="/">
<output>
<xsl:param name="int" select="substring-before($longitude, '-')" />
<xsl:param name="dec" select="translate(substring-after($longitude, '-'), ',', '.')"/>
<xsl:value-of select="format-number($int + $dec div 60, '0.########')" />
</output>
</xsl:template>