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Script shell, how to calculate percentage?

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# 1  
Old 08-04-2011
Script shell, how to calculate percentage?
hello,
please can you help me.

jj and kk are two numbers which are the result of an sql program.

I would like to calculate the ratio jj/kk*100.

I have done this:
ratio=$((jj/kk * 100)) or ratio=`expr $jj \/ expr $kk) but the result is 0

What can i do?
Thanks for help.
Last edited by radoulov; 08-04-2011 at 11:31 AM.. Reason: Code tags.
# 2  
Old 08-04-2011
math is with integers. multiply first by 100.
Code:
$((100*jj/kk))

# 3  
Old 08-04-2011
there is a detailed link from DB which you can use to have an idea:

https://www.unix.com/shell-programmin...es-column.html
# 4  
Old 08-04-2011
Hi,

Try use 'bc':
Code:
$ jj=43
$ kk=25
$ echo "scale=2 ; ($jj/$kk)" | bc
1.72

Regards,
Birei
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