Elapsed time ?

[M. Lewis]

I'm trying to get the elapsed time. The following gives me '1', however 
I would like it to give me 1.98333333. Where am I missing the boat?


#!/bin/sh

TIME1=`date +%s`
echo $TIME1
sleep 119
TIME2=`date +%s`
echo $TIME2


ELTIME=$[ ($TIME2 - $TIME1)/60 ]
echo $ELTIME

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