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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What is the area of this Trapezium

enter image description hereThere is a triangle that contains 3 triangles and a trapezium. The area of these triangles are respectively 4, 7, and 14. What is the area of the Trapezium?
Shuban Kistareddy PUPIL
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Ratio of Means of two numbers 10 and 100

Table I was reading a book on computer architecture for my exam and came across this table. I understand all the columns except for the ratio of means. How is the ratio of means of 10 and 100 become 91.8. I would really appreciate if someone can…
Ashik Alim
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Pythagoras theorem and ratio question

https://gyazo.com/66f47546602b91315cceecd66927c129 In triangle PQR, X is a point on PQ. RX is perpendicular to PQ. Work out the ratio PX : XQ. Give your answer in its simplest form. Answer ________ : ________
THELichCA
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Apprently simple proportion question.

There are 5000 buyers of apples, who each on average buy 12 apples a month. There are two types of apple buyers, those that buy red apples, and those that buy green apples. The red apple buyers buy an average of 5 a month. The green apple buyers buy…
Jane Watson
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Why does 1:2 = 1/2?

My natural instincts tells me 1:2 = 1/3, because the LHS is 1 part of 3. For example, if something was in the ratio 1:1, I would expect the LHS to be 1/2 of the whole, so why is 1:1 = 1?
user47860
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how to convert $1.91$ (CAD)/kg into dollars/lbs?

edit: how to convert $1.91$(CAD)/kg into dollar/lbs? I was looking at some grocery pricing and I couldn't figure how to convert back into lbs as some stores will list it in lbs, and others will list it in kg. How to convert $1.91$(CAD)/kg into…
rgex
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ratio word problem

2kg beef is cut into 3 pieces A, B and C. The weights of A and B are in the ratio 2:3. If the weight of C is 0.5kg, find the weights of A and B.
Alex Lam
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Screen display ratios

So I was creating a script to determine the aspect ratio of screens based on resolution. Am I right in saying that 1366 pixels x 768 pixels is not in fact a true 16:9 ratio? In this case I am stuck as to how to calculate the common ratio of computer…
Chris
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If A:B is 2:3, B:C is 4:5 and C:D is 6:8. Find A:B:C:D

If A:B is 2:3, B:C is 4:5 and C:D is 6:8. Find A:B:C:D? I am able to find A:C , B:D. $\frac{A}{C} = \frac{A}{B} × \frac{B}{C}$ $\frac{B}{D} = \frac{B}{C} × \frac{C}{D}$ But I am not able to find A:B:C:D.
Sunny
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alligation and mixture concept clarity

i want to clear my concept of alligation. a vessel is filled with liquid, 3 parts of which are water and 5 parts are syrup. how much of the mixture must be drawn of and replaced with water so that the mixture may be half water and half syrup?? ti i…
Neeraj Sharma
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Solving a compound ratio problem

There is food for 800 men in a fortress for 30 days. After 10 days 400 more men join in. How long the food will last while food per man is 2/3 from before. I listed ratios as following Days Men Food 30 800 1 (all…
Sayam Qazi
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Numerical Reasoning EPSO Ratio Question

I would appreciate if anyone can please guide me on the workings to this question from the EPSO site. In 2000, what was the ratio of GDP in the Netherlands to that in Finland? Possible Answers: (a) 1:3 (b) 2:3 (c) 3:2 (d) 3:1 …
Paul L
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What does this formula do?

I'm examining voltage drop across 2 series resistors. As part of my results table I am asked to calculate $\frac{R_1}{R_1 + R_2} \times V_3$ and $\frac{R_2}{R_1 + R_2} \times V_3$. This all relates to Kirchhoff's Voltage Law. Is this basically…
FormulaFinder
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Homework help: Ratios in Mathematics

I'm trying to solve this ratio problem. Can't seem to get around in solving it. $750g$ of salt is to be divided between three storage cans $A, B$ and $C$ in the ratios $A:B = 5:2$ and $B:C = 3:2$. What mass of salt will be stored in each can? A…
shnaz
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UEC Exam ratio problem

I am going to sit for UEC exam and I am 15 years old and I need helps. The question is as follow: If p:q:r=3:5:7 and p+q=56 Find the value of p+q+r Thank you
Steve Tan
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