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javascriptmathdecimalfractions

Convert number of weeks in decimal to fraction

I ma struggling with this mathematical-based query.

I have the difference in seconds between two dates, and would like to convert the number of seconds to a fraction. I have the decimal working well, but am struggling to figure out how I can convert this value to a fraction.

So, for example, the number of weeks difference between the two timestamps is 4.285714285714286. I would like to represent this as 4 2/7.

Can anyone suggest the most efficient way to achieve this in JavaScript?

Solution

  • Maybe I didn't understand your question, so this could be a very naive answer. If yes, just says so. 

    var
  a = new Date(2011, 12, 31),
  b = new Date(2011, 12, 1),
  weekMilliSeconds = 7 * 24 * 60 * 60 * 1000,
  fraction = (a - b)  / weekMilliSeconds,
  weeks = Math.floor(fraction),
  days = Math.round((fraction - weeks) * 7);

console.log(
  weeks + ' ' + days + '/7'  // => 4 2/7
);