Answers

2014-09-09T20:51:33+08:00
Long cut
  1)multiply the numerators together
     example:  1/2 * 2/4        = 1*2= 2,so their numerator is 2
   2)multiply the denominators together
     example: 1/2 * 2/4         =2*4=8    so their denominator is 8
           so the answer is  2/8    
   3) Reduce if possible find their GCF
      example 2= 1 and 2                  their GCF is 2 so divide the numerator and                             8= 1,2,4 and 8              
                                                                 denominator with 2

Short cut
1) use the cancellation method 
2) then multiply the numerators together and denominators together

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2014-09-09T20:58:11+08:00
Just multiply the numerator to the other numerator.
Then, denominator to denominator. :)
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