# gcalctool percents

How can i calculate percents?

For Ex. 80 - 20%, 80 + 20% etc.

When I press '%' button it just divides number by 100.

Expected results is 80 - 20% = 64, 80 + 20% = 96

## Question information

- Language:
- English Edit question

- Status:
- Solved

- For:
- Ubuntu gcalctool Edit question

- Assignee:
- No assignee Edit question

- Solved by:
- Aleksey Kirpichnikov

- Solved:
- 2007-12-06

- Last query:
- 2007-12-06

- Last reply:
- 2007-12-06

Cesare Tirabassi (norsetto) said : | #1 |

This must be the most asked question about gcalctool.

As for all scientific calculators, the % sign calculate the percentage (x/100).

If you need to use it for financial calculations, like 80-20% than you need to do it like this:

80*(1-20%) or 80*(1-0.20) or 80*0.8

Well, i understand that it works, but it's so complex to calculate.

This operations is much easier to calculate on any hardware calc. Even kcalculator can do it easier

Cesare Tirabassi (norsetto) said : | #3 |

Easier for you perhaps, since you are used to financial calculators.

I'm used to scientific calculators and I find 80-20% a non-sense; different people have different views, mine is as good as yours, neither of the two is the right or wrong one.

The authors of gcalctool view it as a scientific calculator, not as a financial one, therefore their choice.

PS. My hardware calculator is actually using RPN, which I find the most easiest and logical mathematical notation for pocket calculators. In this case you need to do: 80 20 % -

Just be glad I'm not the author of gcalculator :-)

Calculator has four views! So when i use financial view it would be good to calculate as hardware one.

Well, i try to find more simple calc )

Cesare Tirabassi (norsetto) said : | #5 |

bc - The GNU bc arbitrary precision calculator language

dc - The GNU dc arbitrary precision reverse-polish calculator

kcalc - calculator for KDE

speedcrunch - High precision calculator

abakus - calculator for KDE

apcalc - Arbitrary precision calculator (original name: calc)

apcalc-common - Arbitrary precision calculator (common files)

apcalc-dev - Library for arbitrary precision arithmetic

cafix - Communicates with CASIO graphic calculators

calc - An advanced calculator and mathematical tool for Emacs.

calcoo - Scientific calculator (GTK+)

concalc - console calculator

donkey - One Time Password calculator.

edenmath.app - Scientific calculator for GNUstep

extcalc - multifunctional scientific graphic calculator

gafix - An editor for Casio calculators

galculator - A GTK+ 2.0 based calculator

genius - general purpose calculator and math tool with many features

graphmonkey - a GTK#-based graphing calculator

grpn - GTK+ reverse polish notation calculator

kalgebra - calculator based on MathML language

keurocalc - universal currency converter and calculator - binary package

keurocalc-data - universal currency converter and calculator - data package

orpie - RPN calculator for the terminal

qalc - Powerful and easy to use command line calculator

qalculate - Powerful and easy to use desktop calculator - transitional

qalculate-gtk - Powerful and easy to use desktop calculator - GTK version

qalculate-kde - Powerful and easy to use desktop calculator - KDE version

r-cran-fcalendar - GNU R package for financial engineering -- fCalendar

rcalc - graphical symbolic calculator

rpncalc - RPN calculator trying to emulate an HP28S

sc - Text-based spreadsheet with VI-like keybindings

sipcalc - Advanced console-based ip subnet calculator

snac - complete algebraic calculator for GNOME

stepulator.app - Scientific calculator implementing RPN notation for GNUstep

tilp - TI calculator <-> PC communication program for X

tilp2 - TI calculator <-> PC communication program for X

wcalc - A flexible command-line scientific calculator

wmcalc - Dockable calculator application

xabacus - simulation of the ancient calculator (plain X version)

xmabacus - simulation of the ancient calculator (Motif version)

tiemu - Texas Instruments calculators emulator

gcalctool - A GTK2 desktop calculator

kalgebra-kde4 - mathematical calculator for KDE4

Thank you very much!

P.S. i bind my Numlock button on keyboard to start calculator, so i need small, fast and with percent calculations one :)