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(a) 51/64, 13/16, 13/8, 5/6

Find the smallest COMMON denominator.

The largest denominator in the series is 64.

3 times of that is 192, which is the smallest common denominator of the series.

So the series becomes:

153/192, 156/192, 312/192, 160/192

Rearranging the series in ascending order:

51/64, 13/16, 5/6, 13/8

PS. I hate such problems because they are tedious 😛 .

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Thanks!!! But this involves big denominator. How do you derive 3X as the smallest common denominator fast w/o calculator? 

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192 is the lowest common denominator for the series.  The problem is with the fraction 5/6 and 51/64.  6 cannot divide 64 completely, nor does it divide 128 completely.  The only number that can be divided completely by 6 and 64 is 192.

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How do you solve the 2nd qns? Can’t seems to find the LCD.. all have 143 except for the denominator 17. 😰

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Actually, if you can use calculator, then just divide them all and rearrange them in order lor… haha.

(b) 7/11 should be the biggest as it is > 0.5

4/14 should be bigger than 3/13

5/17 should be bigger than 4/14

So it should be 3/13, 4/14, 5/17, 7/11 #

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Yes indeed! Thanks. Let me try on the other 2.

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