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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Multiplying a number with percentage to get a determined sum
What percentage do we have to multiply with 125 dollars to get 355 dollars?
125(100/x) = 355
12500/x= 355
12500 = 355*x
x = 12500/355 = 35,211…
125 dollars * 1,35 = 168.75 dollars (wrong)
125 dollars * 3,5 = 437.5 dollars (also wrong)
Math is fun
- 119
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Calculating percentages
I'm a total noob and need help with this, I don't understand it at all. I need to find out the percentage change using the 2 numbers for each question, some have increased some have decreased.
Calculate the percentage (%) change in mass of carbon…
Will
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Equation for amount of "today's money" spent in a mortgage with inflation taken in consideration
I'm having problem coming up with a way to express the recursive(compound?) nature of the inflation. Monthly the payment \$38.19 is decreasing in "today's month" value but just how much its decreasing is not linear so I'm looking for help for an…
Gugg
- 101
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How to count proportional distribution of given numbers?
I am trying to figure out how to count proportional distribution of given numbers - for example:
Number A: 5
Number B: 5
Number C: 5
In this case it means that the proportional distribution of each number is 33%.
But what if:
Number A: 17
Number B:…
user984621
- 333
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What is the fastest algorithm to calculate percentage change between two doubles
I would like to know what is the best solution to find the percentage change of a double compared to another one.
For example, I have a variable called 'current', I want to compare it to a variable called 'previous'. I need this for statistic…
JBoy
- 101
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2 answers
Repeated percentage calculating question
"In a town, 75% of the workers drive a car to work. During an environment-week, only 20% of the workers drove their cars to work. How large percentage of the workers that normally drive the car left their car at home during the…
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How to calculate percentage of an amount
I don't know if this is the right forum to ask, but i need to have a % from an amount, and hope there is a formula to calculate it.
Example:
Some payment methods have a 1.8% fee of the total amount a user has in their shopping basket.
Now i want,…
Refilon
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Dilute a 70% solution in a 55 gallon drum to 10%.
I have a 55 gallon drum that contains a 70% detergent solution. If I want to dilute that solution to 10%, how much water do I add?
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Average Percentage Change for Positive & Negative % changes
How do you calculate the average percentage change for the following:
1) +5.2%
2) -1.25%
3) -1.74%
4) +4.21%
Using all four numbers together.
VIN
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How do I calculate the percentage something has increased by x times
First time posting here, so please be gentle
Suppose I have a numerical value which has sustained linear growth over 2 years
Lets say in Jan 2013 the figure is 22,000, and in Jan 2015 it's 33,000. I don't know the value for the year in between, just…
roryok
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Percentage depreciation formula
The population of a city increases by 5% annually. If its population in 2010 was 138915 then, What it was in 2007 ?
Solution :
=138915 / (1 + 5%)^3
=138915 / (1 + 5 / 100)^3
=138915 x ( 20 / 21 x 20 / 21 x 20 / 21 )
= 120000.
I need to understand…
deepsy
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How to represent a ranked number as a percentage?
I couldn't do better with the title so let me try and explain:
Say I have two numbers: items and rank.
items is the number of items in a sorted list.
rank is the rank of the item I'm concerned with.
If items=8 and rank=1, I would like the percentage…
Tim M
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Question on accrual percentages with contributions
Let's say I contribute a random amount per month to an account. I do this on the 1st of the month. For January through April, my contributions were $100.00, 120.00, 150.00,$ and $100.00$. On April 11th I check the account and find a balance of…
Paul
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Two Approaches to Calculating Combined Percentages
Upon some event there is a 50% chance that something has a 75% chance of happening. It is my understanding that there is a $.75/2 = .375$ probability of this. Is there any way to know the probability if the first event does not occur?
user202800
- 23
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Percentage problem for fair usage
I need some help for calculating fair usage percentage
I got $50000$ main credits to use daily and $30$ users in my website.
Each users bought different number of sub credits. For example user $1=100000$ sub credits, user $2= 50000$ sub credits,…
