A percentage is a number or ratio expressed as a fraction of $100$. It is often denoted using the percent sign, "$%$", or the abbreviation "$\mathrm{pct}$." -Wikipedia. Percentages are used when describing portions or proportional changes.
Questions tagged [percentages]
1440 questions
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votes
1 answer
Percentage , Profit and Loss
IF After successive discounts of 20% and 6 1/4% on the Marked Price of an article ,a trader gets 20% profit on the cost Price ,then by what percent is the marked price above the cost price?
I have tried:
Let the marked priced be rs 100
for…
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votes
2 answers
Profit-Loss Problems
A dishonest merchant makes a 10% profit at the time of buying and a 5%
loss at the time of selling the goods he/she trades. By doing so if
the said merchant made a profit of $900 on a particular item, what was
the real cost of the item…
Junayed
- 1
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votes
3 answers
Find source from percentage number
Yeah, I might look stupid with this question but Math classes are so long ago for me :).
I need to find the exact number that makes 18.20, 82% off.
So to clarify:
(?) * 0.82 = 18.2
How do i find that number? Thanks!
Nique
- 111
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votes
1 answer
Find the no of votes secured by the person?
$5000$ voted in an election between two candidates.$14$% of the votes were invalid.The winner won by a margin approximately closer to $15$%.Find the number of votes secured by the person.
MyApproach
$5000$ . $43$/$50$ votes were valid.
Out of…
justin takro
- 1,288
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votes
1 answer
.Determine the pass percentage given the following conditions?
MyApproach
I want to ask is this question incorrect because the data given to us says $80$% of the students passed in maths and how $29$% of the students failed in both?
justin takro
- 1,288
-1
votes
1 answer
20% of X is Y, then X is?
Please help me to find out X:
20% of X is Y, then what is X?
For Example if 20% of X is 1030, what was that X?
Please don't just give me the fish. Let me know how to catch.
Thanks
Vahid
- 177
-1
votes
2 answers
What does it mean to "cut-off 10% your weakest exam"?
Say that I have two exam grades:
$$e_1$$
and
$$e_2$$
and that exam $e_1$ is worth $p_1$ of your grade and $p_2$ percent of your grade ($p_1 + p_2 = 1 $). If on top of that weighting I promise to cut off 10% (or $\delta$ percent) of your lowest…
Charlie Parker
- 6,546
-2
votes
1 answer
Problem with inflation 2016-2022 : CPI and percentage mismatch
this is my problem and i hope you can help me.
I need to calculate total inflation for the period 2016-2022 in a certain coutry. The problem is that I can't match the data, obtaining the same result using the consumer price index and the percentages…
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votes
1 answer
Why is $\,X\!\cdot\!10\%\!\cdot\!10\%\,$ not the same as $\,X\!\cdot\!20\%\,$?
This confuses me a bit:
$X = 100$
Multiplying in two steps :
$100\cdot1.1 = 110$
$110\cdot1.1 = 121$
Directly multiplying by $1.2$ ($20\%$) :
$100\cdot1.2 = 120$
Black
- 107
-2
votes
1 answer
calculate the margin in percent
My brain is fried and don't know where else to get the answer, so please be nice :-)
I can calculate the margin in percent when I got the original number 12.27 and the new number 27.968. I can do this to get the margin in percent:
27.968 - 12.27 =…
Cudos
- 163
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votes
1 answer
Is there any easy way to estimate this formula?
I often see this formula,
the percentage is same,
$$
\frac{28311}{1+16.8\%} \times 16.8\%
$$
$$
\frac{21011}{1+15.7\%} \times 15.7\%
$$
$$
\frac{11019}{1+12.5\%} \times 12.5\%
$$
is there any easy way to estimate the formula?
such as this…
lustre
- 99
-2
votes
1 answer
How can I find out how much I need to earn to pay off bills and taxes?
The Self-Employment tax calculation is: ((earnings * .9235) * .153)/2 — e.g. my earnings are 36,000. Tax bill is 2,543.32 and net earnings is $33,456.68.
If I have $12,000 in bills for the year, what's the formula to find out how much I'll need to…
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votes
1 answer
Working out how much time has increased by in %
I have two time values:
Previous
3d 5h
Now
5d 7h
How can I work out how much it has changed by in terms of percentage.
Thanks
bobo2000
- 97
- 2
-2
votes
2 answers
Help to solve equation with percentages to form sale prices
I have some values where are applied dynamic taxes, for example:
100 - 3.60% = 96.40
200 - 7.69% = 184,62
But before subtract these taxes i need to find a second percentage, for example:
(100 + x%) - 3.60% = 100
(200 + x%) - 7.69% = 200
This is…
Marcio Mazzucato
- 99
- 4
-2
votes
2 answers
Finding the percentage
I was thinking 32.5%. Due to 70% of the 25% who do own a device would be 17.5% and then minus that from the 50%.
But the only answers are- 50%, 43%, 37.5%, 60% or Cannot Say.
Am i missing something really obvious here?
