How do I divide in the Linux console?

Question

I have to variables and I want to find the value of one divided by the other. What commands should I use to do this?

Answer 1

Better way is to use "bc", an arbitrary precision calculator.

variable=$(echo "OPTIONS; OPERATIONS" | bc)

ex:

my_var=$(echo "scale=5; $temp_var/100 + $temp_var2" | bc)

where "scale=5" is accuracy.

man bc 

comes with several usage examples.