Mathematics Stack Exchange
Mathematics Stack Exchange

Questions tagged [ratio]

For questions concerning the ratio of a certain quantity to another.

In mathematics, a ratio is a relationship between two quantities indicating how many times the first number contains the second. For example, if a bowl of fruit contains eight oranges and six lemons, then the ratio of oranges to lemons is eight to six (that is, $8:6$, which is equivalent to the ratio $4:3$). The numbers compared in a ratio can be any quantities of a comparable kind, such as objects, persons, lengths, or spoonfuls. A ratio is written "$a$ to $b$" or $a:b$, or sometimes expressed arithmetically as a quotient of the two.

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Split bills at home

I'm trying to make a spreadsheet to split the house bills with my SO. I want to split the bills accordingly to our income so (the values are dummy) incomeA = 1000; incomeB = 600; percA = incomeA / (incomeA + incomeB); (0.625) percB = incomeB /…
Bruno Camarneiro
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Ratio of money distributed among friends

Some money (dollars) is divided among friends A,B and C in the ratio of 5:6:9 After A gives fifty dollars to his mother, the ratio becomes 3:4:6 Find the amount of money A has after giving fifty dollars to his mother.
Wardah
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ratio, rate and proportion

In a club there are 1500 boys and some girls, the ratio of number of girls to the boys is 3:10. after some more girls joined the club, the ratio of number of girls to the number of boys becomes 9:15. Find the innitial number of girls in the club.
Hira Iftikhar
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Ratio problem under given conditions

The ratio of male to female pupils going on a skiing trip is 5:3. 4 male teachers and 9 female teachers are going on the trip. The ratio of people going on the trip, including teachers is 4:3. How many female pupils are going on the trip? I…
Shiro
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Age based problem

Ajay’s age was 4 times the age of his son when Ajay was as old as his daughter is now. If his son is now half as old as the daughter, find the ratio of the present ages of Ajay and his daughter.
Bharadwaj
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Simplifying more than three ratios

I was asked by s student to solve this question based on ration proportion and my answer was 5:1 although not sure. The question was, The ratio of goats to sheep is 4:3.sheep to cows 5:2.cows to donkeys 3:2. Find the ratio of g:d? Kindly,is it…
Makau Elijah
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Get the inverse of ratio, what is the mathematical term?

I need to create kind of the inversed ratio. What i mean: Let's say there are the numbers 1,1,2 the ratio is 0.25,0.25,0.5. The sum of the ratio is of course 1. But i want the "inversed" ratio so the small numbers become great and great numbers…
Marion Piloo
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Expenditure and savings

Junu's expenditure and savings are in the ratio 4:1.His income increases by 20% .If his savings increases by 12% by how much percentage would his expenditure increase? I was struck here How to proceed? ${Expenditure = {4\over 5} \text{ } Savings…
Bharadwaj
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How to simplify the ratio 8.44:29.2?

I have tried 29.2/8.44 and tried multiplying this to get whole numbers but doesn't seem like it's working
chloe loughan
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Which ratio to choose to distribute values

I have simple problem. I want to calculate stock value of purchase products. So I am confuse about which part should I use to calculate ratio. Is it base price or total price (Price x qty). With base price ration is 80 : 20 and for total its 88.88…
Code OverFlow
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Cordial Ratios - per litre compared to as is

This has got us stuffed but I feel there has to be a simple explanation. Q: concentrate:water are 2L:1L, 3L:2L, 1.25L:750mL, 2L:1.5L, 1.5L:800mL. If you mix all together what is the ratio? Leaving quantities as they are you get a different ratio to…
Paul Smith
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Ratio of Speeds of Trains

Recently, I came across a question: A train $T_1$ from station $P$ to $Q$, and, the other train $T_2$ from station $Q$ to $P$, start simultaneously. After they meet, the trains reach their destinations after $9$ hours and $16$ hours respectively.…
code_master5
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(Ratio) here I am confuse with what does 5:12 actually means ?

I am confuse with this , Suppose one pencil cost 10 and erase cost 2 , according to ratio and proportion it mean 10:2 = 5:1 it mean pencil is 5 times the cost of erase how does this concept is related to the below question A company “A” sells a 53cm…
Shubham
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Simple Ratios Shortcut - Why does it work?

I am preparing for a competitive examination which consists of quantitative aptitude. We came across a question on Ratios as follows: Two numbers are in the ratio 4 : 5. If 7 is added to each, the ratio becomes 5 : 6. Find the numbers. Now to…
Neil
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Why does 100% represent the whole of something

I want to start off by saying I'm not someone who is particularly strong at math, and that this is a fairly abstract question. Today I was reading a comment on reddit, a user posted something to the effect of if you aren't sure 100000% about doing…
Jerred Shepherd
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