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]
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Question about NBA lottery picks and percentages
Question:
team1 has a 9% chance at getting the top pick.
team 2 has a 3% chance at getting the top pick
If team 1 trades a player for team 2’s pick does team one now have a 12% chance at the top pick?
Eric P
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3 answers
Derive Compound Interest Formula
I'm trying to derive Compound Interest Formula
$100 is given
1% interest per month
I can manually work this by hand (and Excel)
See how the formula just expands?
How to create simple formula such that person can find total interest paid at a given…
Marium
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Calculate the reverse percentage if total is unknown
Lets say, I'll get 100.000 USD in 30 days, but I need most of the money now. I find a (possibly weird) bank who offers me 1.25% interest for these 30 days, which is $1250. So they pay me 98.750 USD now and I'll have to repay 100.000 USD in 30 days -…
iGEL
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Wally Bought A Dog
Wally bought a dog. There was a $25\%$ discount because it was a sale day, a $10\%$ further discount off of the result because it was a big dog, and a $5\%$ further discount off of that result because he did not use a credit card. (In other words,…
J. DOEE
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Percentages on population
The population of london is 12,60000. Of this 2/3rd are men and they are to marry women of London only. If 40% of men were married, find the % of unmarried women?
user605287
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1 answer
Percentages on votes
In an election 60% of votes cast their votes. There are 80,500 people in the area. In a contest between Mandy and Shah, Mandy won the elections by 1300 votes more than Shah. By what % of votes cast did Mandy win over Shah?
user605287
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1 answer
What is the correct way of calculating the average percentage in this scenario?
Assume that there two people working in a call centre: PersonA and PersonB.
They are both waiting for calls in separate locations.
I want to calculate the average amount of time spent waiting overall.
The scenario is this:
PersonA spends 50 minutes…
SnookerFan
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Why my arithmetic approach in a particular % question does not work
Note: Since i could not copy the text of the question i had to attach it as images.
I have 1 question in my book as below
Data
Question
The correct answer to this question is 108.7% based on the reasoning explained in the book; it made sense. They…
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1 answer
Figuring out Percent of decimals
This may seem really juvenile but I honestly am struggling.
I remember in school being taught this:
1% = X / 100
Then to figure out any percent times 1% by Y.
But if I substitute X to be 9.25 and Y to be 9.02 things get confusing.
9.25 / 100 =…
treyBake
- 103
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2 answers
Quantitative aptitude-profit and loss
A merchant earns 25% profit in general
Once his 25% consigment was abducted forever by some goondas. Trying to compensate his loss he sold the rest amount by increasing his selling price by 20%.What is the new percentage profit or loss ?
A.10% loss…
Megha Ginnare
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What is the difference between $x\times 0.8$ and $x \div 1.2 ? $
I came across this problem in a Khan Academy course:
There are 20% percent more goblins than wizards in a magic club.
There are 120 goblins in the magic club.
To solve this problem I tried: $120 \times 0.8 = 96$. The correct answer was: $…
user549013
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votes
3 answers
Calculate improvement percentage based on time spent
I am doing a task that it takes 2 hours. After some changes the same task takes 10 minutes. What formula I can use to calculate the improvement percentage between these 2 values?
user2818430
- 123
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votes
2 answers
Calculate the total cost of a loan with variable interest rate
I would like to compare mortgages on a $100,000 loan to see which is most economical.
Option 1
5 years at $1.89\%$
then 5 years at $3.78\%$
Option 2
10 years at $2.49\%$
Is it simply a matter of calculating the compounding amount for $\$$50,000 at…
pingu
- 127
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1 answer
Given we want to charge 0.5% of the total but we don't know what the total is, just what we paid.
This is very basic but struggling with coming up with an answer and would appreciate the help.
Given an amount + fee (0.25% on amount), how can I work out what the remainder of the fee is so that both fees work out to exactly 0.5%(tf) of the total…
TBohnen.jnr
- 123
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Percentage addition and multiplication
This is probably a stupid question, but thanks for the answer in advance.
I'm trying to build a simple expression calculator and I'm stuck on a problem
every calculator seems to treat differently:
100+10%*100
The question is what should be…
gravi
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