what is bigger 5/8 or 11/20

my maths question cant quite get the hold of fractions could need some help if willing :L

$\frac{5}{8} \; or \; \frac{11}{20}$

The easiest way to compare these numbers is to put them all over the same denominator.

If both the top and bottom of a fraction are multiplied or divided by the same divisor, the fraction will stay the same; ie 1/2 - multiplying both top and bottom by 2 gives 2/4 which is the same thing.

Look for the lowest common multiple of 8 and 20 (or, do a cheat which i do - multiply 8 by 20 to get an answer which is a common multiple)

$\frac{ }{160} \; or \; \frac{ }{160}$

Next, multiply the top of the fraction which had the 8 below it, by 20, and the top of the fraction with 20 below it, by 8.

$\frac{5\times 20}{160} \; or \; \frac{11\times 8}{160}$

This can now be simplified to

$\frac{100}{160} \; or \; \frac{88}{160}$

This can now be compared , to see that the

$\frac{100}{160} \; > \; \frac{88}{160}$

so

$\frac{5}{8} \; > \; \frac{11}{20}$

(note, > means the left is bigger than the right. < means the left is smaller than the right.  This can be remembered by 2 ends is more than 1 end, so the bigger number will have the most ends.)

answered Apr 4, 2013 by Level 3 User (4,620 points)

5/8 easy

answered Dec 20, 2013 by sakina khan

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