can "20% - 60 = 59.83" work?

[Quest]

I wanna know if it does?

"20% - 60 = 59.83"

[Quest]

..... thats ".20 - 60"

can php use %?

like 20% of 60??

[Quest]

$a = 20% of 60;

echo $a;

12

[Weedpacket]

Back in Primary School I learnt how to do percentages:

Twenty percent of sixty:
$a = 20/100 * 60;

[Quest]

thx

[dopp]

just be careful you don't start doing the modulus operation (it is the % operator). 😛

[sabu]

Back in primary school I learnt to read the question.

Right, finding 20% of 60 is easy, swipe all the overcomplicated junk above and use

$a = 60 * .2;

However the specific question, and I'm going by what is typed, not what it might mean if the sender knew how to properly construct a sentence, could be interpreted as "twenty percent of A, minus 60, is 59.83"

Not having been told what A is, we'll have to find it out.

(A .2) - 60 = 59.83
(A .2) = 119.83
A = 599.15

So, "20% - 60 = 59.83" does work, providing that the '20%' there means "20% of 599.15"

If the first reply is assuming correctly, then it doesn't work, as 0.2 - 60 certainly does not equal a positive number, much less 59.83.

59.83 is, by the way, ~99.7% of 60

[Cailean]

:glare:I hate math... I've always hated math... I think I hate math more now... in the eighth grade, I told myself I could live without math... I think I'll give it a try... :glare:

[sabu]

I personally can't stand the stuff :queasy: but I was in a mathematical mood above, and it's not complicated stuff anyway.

It occurs to me that the next closest guess to the question might be "60 - 0.2", which is 59.8, and.. er.. still incorrect.

[Weedpacket]

Originally posted by Cailean

[planetsim]

Originally posted by Cailean

Whats so bad about maths, maths is everywhere its the only useful subject besides science and CS at school. In fact after leaving scholl prematurely, ive still been learning many things in maths, it helps so so much in programming

[Cailean]

Originally posted by Weedpacket
Same skill set.

Related perhaps, but not the same... I think the ability to think logically is more important to programming than being able to process numbers... after all, isn't that part of why computers were invented in the first place? So we didn't have to do the math by hand...

[Weedpacket]

Originally posted by Cailean
Related perhaps, but not the same... I think the ability to think logically is more important to programming than being able to process numbers... after all, isn't that part of why computers were invented in the first place? So we didn't have to do the math by hand...

Exactly: maths isn't about processing numbers - we've got machines for doing that, after all - it's about thinking logically about patterns (whether they be patterns in numbers or anything else). Being bad at mathematics is a symptom of being bad at thinking logically.

[centure7]

I wanna know if it does?

"20% - 60 = 59.83"

I don't know of any programming language that allows you to simply write "%" like that at the end of a number in order to make it a percent. I suppose it would make some sense, but no. You have to convert values to % form by doing something like this:
$percentage = ($percent_value/100); // converts percentage number to decimal form

For example if you want 20% then you would say:
$percentage = (20/100);

Sample code:
<?php
$percent = 20;
$percentvalue = ($percent/100);
$somevalue = 60;
echo "20% of 60 is: "
echo $percentvalue $somevalue;
echo "<p>";
echo "Taking 20% off of 60 will give you: ";
echo $somevalue - ($percentvalue $somevalue);
?>

PS - The way you wrote your message is extremely confusing. I think you meant you want a way to take a percent off of a number, like 20% off of 60. But you wrote it backwards ("20% - 60") seems like an odd way to say it. 60 - 20% would make some sense. Also, your math is wrong since 60 - 20% is 59.8, not 59.83, assuming by 20% you mean .2. In any case, the sample code should give you an idea how to do whatever it is you are trying to do.

[jfable]

Once in css I tried to do that...I wanted a table to be 100% - 80 pixels to make room for a right aligned fixed width div... { width:100%-80; }

It didn't work.

[madwormer2]

:p :rolleyes:

2+2=5 for larger values of 2......

[lederhoden]

Maths is vital if you want to survive in life - how else can you know if the person behind the counter (or, more importantly, the bar) has given you the right change?

P.S. Can I be your financial advisor? :evilgrin:

[krotkruton]

First off, this whole thread is hilarious.

Secondly, if planetsim was joking, this is also funny... if not, then it's even more funny.

planetsim wrote:

Whats so bad about maths, maths is everywhere its the only useful subject besides science and CS at school. In fact after leaving scholl prematurely, ive still been learning many things in maths, it helps so so much in programming

So, most of the intelligent people out there will get the irony that planetsim was/wasn't trying to point out so there's no need for me to explain. For everyone who doesn't get it, you probably won't even if I do explain, so I won't.

If there is any lesson to be learned here, its that you should stay in school and in English so people in forums don't laugh at your illiteracy.

[chads2k2]

krotkruton wrote:

First off, this whole thread is hilarious.

Secondly, if planetsim was joking, this is also funny... if not, then it's even more funny.

So, most of the intelligent people out there will get the irony that planetsim was/wasn't trying to point out so there's no need for me to explain. For everyone who doesn't get it, you probably won't even if I do explain, so I won't.

If there is any lesson to be learned here, its that you should stay in school and in English so people in forums don't laugh at your illiteracy.

OMG this thread is the funniest thing I have ever read on here. I mean there have been a few that have really made me smile but this one made me start laughing.

You are so right krot, the irony is amazing. I was going to comment that if anything else you should stay in school to learn to spell. You beat me to it and I have to accept that. I just recently took the GMAT (www.gmat.com) and I failed at math. Like straight up failed. 94% of people who took the test did better at math than me. So that basically means that I blow at math.

I am not a big fan of math and after going all the way through Calc2 I want to just commit math suicide. Haha.

OK, take care everyone and thanks for making me smile.

[AIS4U]

Your question was:

can "20% - 60 = 59.83" work?

I wanna know if it does?

"20% - 60 = 59.83"

And Sabu had the correct answer and correct math.

Centure7 stated: Also, your math is wrong since 60 - 20% is 59.8, not 59.83, assuming by 20% you mean .2". But in fact his math is wrong. He is confusing whole number, decimals and fractions.

20% is a whole number which can be expressed as a decimal as .2, or as a fraction as 1/5 (one fifth). 20% of 60 is 12, .2 times 60 is 12, and 1/5 of 60 is 12. Therefore, 60 minus 20% would be 48. But this changes the question. The question was not "what is 60 minus 20%." The question was:

can "20% - 60 = 59.83" work?

I wanna know if it does?

"20% - 60 = 59.83"

And Sabu has the correct answer. Yes, 20% minus 60 can equal 59.83 if the number you start with is 599.15