Noun

ratio (plural ratios)

  1. A number representing a comparison between two things.
  2. (arithmetic) The relative magnitudes of two quantities (usually expressed as a quotient).
  3. (law) A judicial decision.

Related terms

Latin

From Wiktionary under the GNU Free Documentation License.
Tue Aug 31 12:23:47 2010

In mathematics, a ratio is a relationship between two numbers of the same kind (i.e., objects, persons, students, spoonfuls, units of whatever identical dimension), usually expressed as "a to b" or a:b, sometimes expressed arithmetically as a dimensionless quotient of the two, which explicitly indicates how many times the first number contains the second.

Notation and terminology

The ratio of numbers A and B can be expressed as:

  • the ratio of A to B
  • A is to B
  • A:B

The numbers A and B are sometimes called terms with A being the antecedent and B being the consequent.

The proportion expressing the equality of the ratios A:B and C:D is written A:B=C:D or A:B::C:D. this latter form, when spoken or written in the English language, is often expressed as

A is to B as C is to D.

Again, A, B, C, D are called the terms of the proportion. A and D are called the extremes, and B and C are called the means. The equality of three or more proportions is called a continued proportion.

From Wikipedia under the GNU Free Documentation License
Thu Sep 2 19:53:24 2010

What ratio of water to bleach is used to clean petri dishes that have bacteria growing in them?
Q. i am doing a sci fair project and i need to see how to disinfect petri dishes. i know that i need to use bleach but i don't know what ratio of bleach to water to use. 10 points to best answer = )
Asked by Chocolate Cow - Fri Nov 13 18:34:18 2009 - - 1 Answers - 0 Comments

A. It would help to know what kinds of bacteria you are trying to kill. For example, the bacteria Escherichia coli O157:H7 (E. coli) and Staphylococcus aureus (Staph.) both die using 1 tablespoon of Clorox Regular-Bleach per gallon of water. The recommended route is to incinerate used petri dishes. However, for disinfection of these nonporous surfaces without any specifics about desired organism destruction, I would up the dosage and recommend a 10% bleach solution with a good soaking for 30 minutes. This is medical grade disinfectant which kills almost all bacteria, fungi, viruses, and protozoa. NOTE: Bleach solutions must be prepared daily. They lose their strength after 24 hours. Anytime the odor of chlorine is not present, discard… [cont.]
Answered by unknown - Fri Nov 13 19:03:41 2009

How do you approximate the ratio between the intensities of transmission lines?
Q. I know, for example, that the ratio between the K-alpha1 & K-alpha2 lines is approximately 2:1. I need to know how, using a table holding the various quantum numbers of the different shells, you estimate the ratio between any two transitions.
Asked by hawk_stryke - Wed Oct 31 20:03:43 2007 - - 1 Answers - 0 Comments

A. I haven't thought about this in detail, but here are my thoughts. The intensity of the line should be proportional to both the population of the initial state (i.e., the fraction of atoms in the initial state), and to the absolute square of the transition moment. I believe that the K-alpha1 line is a 2P_3/2 --> 1S transition and the K-alpha2 line is a 2P_1/2 --> 1S transition. You can probably assume that the 2P_3/2 and 2P_1/2 sublevels are nearly equally populated. This assumption depends on how the atoms were excited, however. The key here is to note that the 2P_3/2 (J = 3/2 state has four sublevels (M_J = -3/2, -1/2, +1/2, +3/2) and the 2P_1/2 state has two sublevels (M_J = -1/2, +1/2). If all these sublevels carry nearly equal… [cont.]
Answered by Ketone - Fri Nov 2 11:07:02 2007

How do i convert a decimal into a ratio?
Q. How do I convert a decimal into a ratio, I am calculating the acid-test ratio of a company and my result comes as a decimal, eg, 0.76. How do I turn this into a ratio?
Asked by Scooby Who - Sat Apr 24 20:04:40 2010 - - 3 Answers - 0 Comments

A. Well, simple. Multiply it by 100/100, using the multiplicative identity property. = .76(100)/100 = 76/100 You should try to simplify further just in case. My teacher gives no credit to those who don't simplify. 76/100 = 38/50 = 19/25
Answered by allen chin - Sat Apr 24 20:10:37 2010

From Yahoo Answer Search: "ratio"
Tue Sep 7 20:38:25 2010

Perfect waist-to-hip ratio is 0.7 - Times of India
timesofindia.indiatimes.com
Perfect waist-to-hip ratio is 0.7 - Times of India
Thu, 26 Aug 2010 07:21:49 GMT+00:00
is 0.7 Times of India Dixson said the same formula for what men favoured in women came up almost every single time- a waist-to- hip ratio of 0.7. Which means, a waist measurement ... Jessica Alba, Kate Moss Have Perfect Waist-to-Hip Ratio for Attracting Men ... StyleList (blog) Phwoar on waist The Sun Scientist Divulges the Ideal Female Proportions CalorieLab Calorie Counter News Sydney Morning Herald (blog)
Investing in South Korea - Investment U
investmentu.com
Investing in South Korea - Investment U
Thu, 26 Aug 2010 15:57:45 GMT+00:00
Investment U Three months ago, Korea's stock market (the Kospi Index) was trading close to its late 2008 lows, based on a forward price-to-earnings ratio . ...
Smallest Short Interest in the Industrial Conglomerates Industry Detected in ... - Comtex Smartrend
mysmartrend.com
Smallest Short Interest in the Industrial Conglomerates Industry Detected in ... - Comtex Smartrend
Wed, 25 Aug 2010 09:01:47 GMT+00:00
Comtex Smartrend Below are the top five companies in the Industrial Conglomerates industry ranked by the lowest short interest ratio . ...

From Google News Search: "ratio"
Tue Sep 7 20:38:26 2010

compare ratio nc fnal png
hep.bu.edu
compare ratio nc fnal png
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The first plot is done with MC no precuts no likelihood efficiency The second plots is done by just multipling the FNAL numu flux by the numu NC cross section ratio So clearly something is not working properly but it is not just a normalization factor

Ratio
sanguinegryphon.com
Ratio
640px x 600px | 84.20kB

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1 pe ratio png
ritholtz.com
1 pe ratio png
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[source page]

Alert Map America Has To Come To Grips With The Fact It Is Bankrupt A Cyclical Look At P E Ratio Volatility Japan s Nikkei Down On Dismal GDP Data

From Yahoo Image Search: "ratio"
Tue Sep 7 20:38:30 2010

How Did The Male:female Ratio Remain Relatively Unchanged Over ...
winpie.com
How Did The Male:female Ratio Remain Relatively Unchanged Over ...

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Mon, 06 Sep 2010 06:20:21 GM

The . ratio. would be dramatically different if it weren't for war. It would probably be more like 75 25, with men being the 75%. Actually, the world gives little credence to how brutally men are treated in this life. ...

From Google Blog Search: "ratio"
Thu Sep 9 03:35:25 2010