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CBSE - IX - Mathematics - Number System

ratio and proportion

Asked by 2nd March 2008, 2:38 PM
Answered by Expert



A ratio is a comparison of two numbers. We generally separate the two numbers in the ratio with a colon (:). Suppose we want to write the ratio of 8 and 12.
We can write this as 8:12 or as a fraction 8/12, and we say the ratio is eight to twelve.


  Four quantities a, b, c and d are said to be in proportion, if a:b=c:d.

Answered by Expert 12th March 2008, 11:17 AM

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