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Let's see if you nuggets can still math. When a number

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Let's see if you nuggets can still math.

When a number is decreased by 20% of itself, the result is 20. What is the number and what was the equation used?
>>
25-20%=20
>>
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25

(4/5)x = 20
>>
>>606914773
25 * 0.8 = 20
>>
0.2 × X = 20
X = 20/0.2
X = 100
>>
>When a number is decreased by 20% of itself, the result is 20. What is the number
25
>and what was the equation used?
I dunno. mah brain told me so.
>>
>>606914982
Wrong, that equals 24.8
>>
>>606915085
such brilliance
>>
x-.2x=20
.8x=20
x=25
>>
>>606915193
>20% of 25 is 0.2
do you even math?
u retarded?
>>
potato guzinta potato = 20
>>
>>606914773
>X-(X/5)=20
>5X-X=100
>4X=100
>X=25
learntomath/faggot for making me reply
>>
>>606914773
25-5=20
or
25-(25(0.2))=20
>>
Anyone know how to solve this one ?
>>
>>606915387
I'm not him, but 20% is .2, so he's technically right. Obviously you didn't mean it like that, but 25 - 20% = 24.8 is what any calculator will give you. Think he's just pointing out your middle school formatting.
>>
25 right?
>>
>>606915758
draw the last line over onto the other side of the page and poke a hole
>>
>>606915758
it's mathematically impossible, unless you go through walls
>>
25
>>
>>606915896
20% is NOT 0.2. Percentages only make sense when you're talking about a percentage of another number. 20%=0.2 is retarded.
>>
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>>606915758
Faggot
>>
>>606914773

20% is a fifth of 100 20x5=100 so the outcome of your question is 100
>>
>>606916151
Mein toplogy nigger
>>
>>606914773

X - (X/5) = 20
4/5 X = 20
X = 20 : (4/5)
X = 20 x (5/4)
X = (20 x 5) / 4
X = 100 / 4
X = 25
>>
>>606916283
..just wow
>>
>>606914773
100*(20/80)
=10*(20/8)
=5*(20/4)
=25
>>
>>606915359
How did you find such a brilliant way to math?
>>
20/0,8= 25
>>
>>606914773
80% = 20
thus
80X% = 20X

80X = 100
X = 100/80 = 1,25

20 * 1,25 = 25
>>
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>>606916216
You are an uneducated pleb. 1% means 1/100. It's a notation for a fraction i.e. a number. "Percentage of a number" is just the number you obtain by multiplying by the fraction.

For example "50% of X" is 50/100*X (notice the lack of brackets, plebs, it's not fucking ambiguous) which is ½*X. Have a nice day, peasant.
>>
>>606916789
Yeah, but not so easy to do in your head (not that that was the question...)

20/0.8
=20*(1/0.8)
=20*1.25
=20*(1+0.25)
=20+(20/4)
=25
>>
>>606916216
20% literally means 20/100 you retard.
In calculator it doesn't use it this way, but it is mathematecally correct.
>>
>>606917093
How does it do in a calculator then? In excel it stores it as 0.2 and simply changes the display format to 20%
>>
>>606916216
Conformed for non-STEM.

Enjoy burger production.
>>
>>606917093
It says a number decreased by 20% of ITSELF you stupid fuck.
>>
everyone so stupid here ... the result is obviously 20+20*20% = 24
>>
>>606917253
We have engineers making calculators that are idiot-friendly. They convert retarded input into meaningful input. We've come that far.

>>606917459
The guy he responded to wrote 25 - 20%, you stupid fuck.
>>
Hey how do you guys know this, it makesme sed ;(
>>
>>606917018
I'm aware that 20% literally means 20/100 ('per cent'), just the literal meaning isn't the meaning given to it my mathematicians. 20% is not a number..
>>
>>606917581
Oh look, it's op trying to shit his own thread up
>>
>>606917771
>20% is not a number..
That's right. It's a factor: 0.20
>>
>>606917459
lrn 2 read bro
>>
>>606917366
I'm writing my math PhD thesis.

Also, the number of people who think that doing a STEM degree makes them a genius is fucking stupid. Half the students I teach don't know shit.

Proof: you wrote "conformed", retard.
>>
>>606917771
>just the literal meaning isn't the meaning given to it my ENGINEERS
Fixed that for you. 20% IS a number. It's 0.2 i.e. 1/5. Go to the math department and ask anyone if you don't believe me.
>>
>>606918140
>I'm writing my math PhD thesis.
Field? Just curious.
Thread posts: 45
Thread images: 5



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