Answer to Question #131417 in Algebra for Rimsha Ahmed

Question

(1/27 - 1/18)

Kindly, tell me how to take L.C.M of this, please.

Thank you.

Answer 1

Here, we look at the denominators. They are 27 and 18, and they can all divide 54. Now our LCM is 54. Now,

1/27-1/18=2/54 - 3/54 to give -1/54 as the answer.