Compare the following rational numbers -11 by 5 ,21by8
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Answer:
11/5 = -11×8/5×8 = – 88/40
-21/8 = -21×5/8×5 = -105/40
∴ L.C.M of 5,8 is 40
The denominators are the same and so just comparing the numerators – 88 and -105
∴ -88 > -105
= -88/40 > -105/40
Consequently we conclude that
-11/5 > -21/8
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