# Calculator ERROR!!

#### _bigboy_

##### New member
Hello people

past day i was doing some calculations and i've noticed that the calculator d'snt work well. when i try to reduce a percentage to a value the result shown is always wrong.

Anyone noticed that?

sorry for the inglish.

#### Sp1tfire

##### Senior Member
Lol. That's a first. A calculator not calculating correctly

#### Flowlance

##### Senior Member
Show us a calculation so we can try to see if the same happens here

#### Elicetian

##### Member
I guess you are trying 100-20% and you get 99.8 and you expect 80 right ?

#### mchimney

##### Senior Member
I guess you are trying 100-20% and you get 99.8 and you expect 80 right ?

100*.20=20

#### skycamefalling

##### Senior Member
I guess you are trying 100-20% and you get 99.8 and you expect 80 right ?

Yeah, I've heard a lot of complaints from people that expect something like this. I always thought they'd teach math at school

#### onbacardi

##### Senior Member
human vs computer calculator is that even a battle

#### skycamefalling

##### Senior Member
human vs computer calculator is that even a battle

I fear when it comes to calculations with percentage the main problem are users that don't know how to enter the formula right.

My math teacher always said: NEVER use the percent and the root keys of your calculator because they will only cause trouble. Do your calculations the "real" way (x/100*y) instead of percent and (x^(1/y)) instead of root.
It seems he was right

#### Dr.Sid

##### Senior Member
Well I wonder how Root function could fail .. but maybe that's why XP calculator does not have it ..

#### skycamefalling

##### Senior Member
Well I wonder how Root function could fail .. but maybe that's why XP calculator does not have it ..

There's a lot of people here with Android-phones that have problems with root

#### Stonos

##### Senior Member
Well I wonder how Root function could fail .. but maybe that's why XP calculator does not have it ..

The XP calculator has it; it's only in the standard view though. In the scientific view, you can just do x^0.5 where x is your number

#### Lightfunkyone

##### Member
I use the calculator a lot and I noticed this flaw when I got the phone a month ago...daft thing to miss on a high end smart phone ehhh?

Phone os unrooted btw

#### Stonos

##### Senior Member
I use the calculator a lot and I noticed this flaw when I got the phone a month ago...daft thing to miss on a high end smart phone ehhh?

Phone os unrooted btw
Can you show us a calculation where you get a wrong result?

#### Lightfunkyone

##### Member

caught ringer volume when took snapshot...doh

Last edited:

#### dinan

##### Senior Member
I don't see what's wrong with that. The way the computer interprets your command is 100 minus 15 percent of 1 which is 100-0.15=99.85. I assume you want to subtract 15% of 100 to get 100-15=85? Basically the % operation just divides the value by 100. So 15/100=0.15. You still have to multiply that by something (in your case 100) to get back to the percentage of the value you want.

caught ringer volume when took snapshot...doh

#### Intratech

##### Senior Member

caught ringer volume when took snapshot...doh

You're doing it wrong mate. The calculator is giving you the correct answer for what you entered.

Last edited:

#### Lightfunkyone

##### Member
Its not wrong with all the other calcs I use..just wasting energy with all that other crap

##### Retired Forum Moderator
Its not an error with the calculator its an error with user input. Trust me I see this day in and day out because I am a maths teacher.
A calculator will only do the calculation you tell it to do, you still have to know some maths in order to input it correctly

Sent from my X10i using XDA App

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*thanks Symbian for giving us child level calculators now I need to go back to math lessons :-|