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How do I pronounce "ratio 1:1"?

Should I pronounce it "ratio 1 to 1"?

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8  
By spell do you mean pronounce? –  ShreevatsaR Oct 6 '10 at 8:30
    
If you say it in that order, 'ratio' followed by '1:1' you'd say "ratio of 1:1". –  Mitch Apr 20 '11 at 16:32

5 Answers 5

up vote 14 down vote accepted

In speech this is obviously always pronounced "ratio one to one."

In writing, it is a matter of style. Anything of a technical nature should always be written in the 1:1 form, but when writing prose, fiction or something informal, you should certainly consider writing it as it would be spoken:

"The mix was applied in a one-to-one ratio."

The use of hyphenation and words instead of numerals makes the sentence flowing and readable, and encourages the reader's eye to see this as a single, commonly-occurring term.

Note that for the purpose of clarity ratios should generally be stated in the same clause and the same order as the two sets being compared:

"Boys and girls were present in a ratio of 3:2."

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the hyphenation of "one-to-one" is used because it is a phrasal adjective, and not simply because it is easier on the eyes. –  horatio Jun 7 '11 at 14:53
    
It's never pronounced "ratio one to one" –  Matt Эллен Aug 1 '12 at 13:13

Hmm, not sure how correct this is but I read a:b as "a is to b". And a:b::c:d as "a is to b as c is to d". Probably British English (else it's Indian :))

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1  
"Is to" is commonly used in India. Not sure if it has British roots. –  MediumOne Apr 5 '11 at 11:14
    
In that formulation, yes : reads "is to" and :: reads "as". This is common on standardized tests in the USA. –  T.E.D. Jun 7 '11 at 13:30

The pronunciation/spelling-out of "1:1" is "one to one" or "one-to-one." I just wanted to add that you wouldn't say "ratio one-to-one." You would either say "a ratio of one-to-one" or "a one-to-one ratio."

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You would pronounce it "a ratio of 1 to 1", but it's worth noting that there are sometimes exceptions.

In films and photography, for example, ratios such as 16:9 and 4:3 are often described as "16 by 9" and "four by three", respectively.

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I am Indian and I say 1:1 "one to one" and a:b::c:d "a is to b as c is to d".

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