## Problem

I have two variables and need to discover the value of one when divided by the other. To achieve this, what commands should I use?

Asked by kman99

## Solution #1

Surround arithmetic expressions with $((…)) in the bash shell.

```
$ echo $(( 7 / 3 ))
2
```

However, I believe you are restricted to integers.

Answered by dave4420

## Solution #2

```
echo 5/2 | bc -l
```

2.50000000000000000000

‘bc’ has a ‘-l’ option that allows floating results.

Answered by raytrace

## Solution #3

Use “bc,” an arbitrary precision calculator, instead.

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

ex:

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

where “scale=5” is accuracy.

```
man bc
```

Provides includes a number of examples of how to use it.

Answered by user1504475

## Solution #4

You can use awk, which is a utility/language for extracting data.

e.g. for 1.2/3.4

```
>echo 1.2 3.4 | awk '{ print $2/$1 }'
0.352941
```

Answered by jperrie

## Solution #5

I still prefer to use dc, an RPN calculator, so a quick session to divide 67 by 18 with 4 digit precision might look like this.

```
>dc
4k
67
18/p
3.7222
q
>
```

Obviously, there’s a lot more: man dc

Answered by libjack

**Post is based on https://stackoverflow.com/questions/1088098/how-do-i-divide-in-the-linux-console**