1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Ratios and fractions

  1. Jul 31, 2014 #1
    Why can ratios be written as fractions?

    if there are 5 men in 20 people the ratio of men to total people is 5:20 which is 1:4.

    But when we write 1/4 it gives 0.25. And 0.25 means the magnitude of each part when 1 is divided into 4 equal parts.

    So how does ratio and fraction give a same meaning? Please explain it to me.
     
  2. jcsd
  3. Jul 31, 2014 #2

    Char. Limit

    User Avatar
    Gold Member

    I'm not quite sure what you're asking. A ratio is defined, per Wiktionary, as

    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) Short for ratio decidendi.

    Clearly, the second definition is the best used here. If there are 5 men in 20 people, then we can say that on average, 0.25, or 25% of all people are men. That's just another way of saying 25 men for every 100 people, though, which is similar to the 5 in 20 example.

    Sorry, I'm probably not making much sense, but the question is an odd one.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Ratios and fractions
  1. A fraction (Replies: 1)

  2. Fraction of a fraction (Replies: 16)

  3. Division for ratios (Replies: 4)

  4. The Golden Ratio? (Replies: 3)

Loading...