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2

Just for clarity it would be like that : echo 25-5 | bc
– Medhat Helmy
Commented May 13, 2016 at 9:17
For some math problems, you may need to wrap it in quotes, such as echo '0.6 * 12' | bc
– Goose
Commented Jan 26, 2017 at 17:09
1

you might also need to add scale to get floating point precision working i.e. echo "scale=2;557/3672" | bc
– CpILL
Commented Oct 29, 2019 at 23:21

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Correct minor typos or mistakes
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create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
to make links (use https whenever possible)
<https://example.com>
[example](https://example.com)
<a href="https://example.com">example</a>

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