Calculator it's wrong

[Maksim91k]

Calculator it's wrong, I put "100-20%" and the results is 99.8
I download the original Google calculator (it's exactly same) but 100-20% is 80

[Maksim91k]

No I place then without () and naturally these numbers is a simple example all my results are "wrong" 😞

[url=http://postimg.org/image/51xdxtvs3/][img]http://s29.postimg.org/51xdxtvs3/Screenshot_20160401_184652...

[url=http://postimg.org/image/b0h2kx34l/][img]http://s10.postimg.org/b0h2kx34l/Screenshot_20160401_184710...

Here are my results from sony's Cal and Google's Cal

[Maksim91k]

Pictures mistake sorry...

http://s29.postimg.org/5rg6a6wbr/Screenshot_20160401_184652.png

http://s10.postimg.org/ewuegwo49/Screenshot_20160401_184710.png

[_alexdon_]

Yeah, the sony computer does the same 99.8 with and without (). Tested on a Z5c with 6.0. I'll try to get more info on this.

[_alexdon_ · Accepted solution]

@Maksim91k This should be fixed in an upcoming update. Meanwhile, you can use another calculator or use different ways to calculate.

[Maksim91k]

@alexdon
Thank you

[Higins-dad]

It's not wrong. 20% is equivalent to 0.2 and so 100-0.2=99.8. If it's 100%-20% then it's 80%.

[Maksim91k]

@hitlers-dad what are you saying? If you buy something and it's 100€ with 20% must be 80€, all the calculators are OK not only phones but physical also and now you saying that is normal? Try on your PC and find a business calculator and try it

[Uliwooly]

@Higins-dad

@Maksim91k Has a good example, think about it

you go to eat out, the total its $100, you will leave a 20% tip, will the total be $120 or would it be $100.2? 

[Higins-dad]

Totally understand @uliwooly but the flaws are that you have presumed that the percentage is out of $100. So 20%=$20 etc. However the computer does not understand that you want it to calculate the 20% out of 100. So it presumes 20%=0.2. Get it? it has no amount to find 20% of as it's not stated. Say you said (0.2x100) then it knows it 20% of a hundred. Now granted that us humans an some calculators know to find the percentage of the first number but the calculator if it doesn't do this is technically not wrong.

[Maksim91k]

@Hitlers-dad
You are wrong man... 20% it's not 20€ because we don't calculate only this value. If you want to buy a t-shirt and this t-shirt is 74€ but the store has 30% discount how that will cost? With your logic 73,7 .And I can't understand you... Why we must change this calculate method? I tell you all calculators are doing this "100-20%" = 80