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# Re: [libreoffice-users] How do add percentage in Calc?

```Hi :)
It takes skill.  Didn't Isaac Newton write an entire book, a huge tome of a book too, about "1"?

There is an inconsistency which might be worth writing up as a bug-report except that Excel does
exactly the same and is possibly useful to some people.

Also some people on this list might not be ten yet (or do ten-year-olds do trig functions and
calculus nowadays?) or those of us that are decades older might be too focused on 'higher planes'
and not remember stuff like that from school.
Regards from
Tom :)

--- On Sun, 4/3/12, Johnny Rosenberg <gurus.knugum@gmail.com> wrote:

From: Johnny Rosenberg <gurus.knugum@gmail.com>
Subject: Re: [libreoffice-users] How do add percentage in Calc?
To: users@global.libreoffice.org
Date: Sunday, 4 March, 2012, 1:09

2012/3/3 Tom Davies <tomdavies04@yahoo.co.uk>:
```
```Hi :)
Ahah, now i see the original question it makes more sense! :)  If A1 is going to contain a normal
number and A2 a percentage then a 3rd cell such as A3 would be the best place for the answer.  It
keeps the original number unchanged so that you can check the result.

In A3 type in the formula given earlier
=A1+(A1*A2/100)

This assumes the number in A2 is just written as a number without having the % mark after it.
There is an inconsistency in that if you type in the number and then
Format - Cell - General - Percentage
then the number would be shown as 290%.  However if you format the relevant cells in advance, in
the same way, and then type in the number 2.9 then it shows as 2.9%.  Also if you don't bother
with any formatting and just use the % key on your keyboard to type in 2.9% then it is shown as
2.9% in the cell and is treated as a number.  So, obviously it is wise to do a test-run first to
see if you get the result you expect.
```
```
Oh man, you just made a very simple thing like percent to look very complicated…
It's very easy, most of us learned about it at the age of something
like ten, maybe earlier in some other countries, I don't know.
Just type 100 into A1, then 2.9% into A2 (LibreOffice Calc will
automatically convert it to 2.9/100 for you, but it still shows up as
”2.9%”, which is the same thing anyway), and finally =A1*(1+A2) in A3
and you'll get 102.9 as a result in A3, simple as that.

If you want it to be even more obvious what's going on, enter
=A1*(100%+A2) in A3. 100% will automatically be changed to 1, though,
so you'll get the same =A1*(1+A2) anyway.

Kind regards

Johnny Rosenberg
ジョニー・ローゼンバーグ

```
```
A percentage is really just a number "over" or "divided by" 100 of course.  So 2.9% is really
2.9/100 which is obviously 0.029.  Typing in 0.029 can cause further confusion of course. lol

Regards from
Tom :)

--- On Fri, 2/3/12, PDA1 <peace@aleksandrsolzhenitsyn.net> wrote:

From: PDA1 <peace@aleksandrsolzhenitsyn.net>
Subject: [libreoffice-users] How do add percentage in Calc?
To: users@global.libreoffice.org
Date: Friday, 2 March, 2012,
21:59

I have no idea how to add a percentage to a number in Calc.

Example;

Cell A1 has the number 100

Cell A2 has a percentage- 2.9%

I want to add 2.9% to the number in A1 so that the answer is in cell A1.
That is- 100  +2.9%
(just for your reference- the percentage in A2 is always changing from my
input)

How in the world do I do it?

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