From Notes Wiki
'bc' is an arbitary precision calculator for Linux. It is very useful as normal shell arithmetic is very limited. For example shell does not supports division of real numbers.
Using bc to perform divison of real numbers in shell script
Example script which uses 'bc' to divide two numbers is:
#!/bin/bash Numerator=5 Denominator=2 Quotient=$(bc <<END scale=20 $Numerator/$Denominator quit END ) echo "Result is $Quotient" exit 0