Find the L.C.M of the fractions 2/7 , 5/14, and 4/21  Choices.
A) 1 1/7
B) 3 4/7
C) 2 4/7
D) 2 6/7
E) 2 7/7
Explanation:   L.C.M = L.C.M of numerator/ H.CF of denominator   L.C.M = L.C.M of 2,5,4 / H.C.F of 7, 14, 21,   L.C.M = 20/7,   L.C.M = 2 6/7   Answer: Option 2 6/7
<result>D</result>
Find the L.C.M of the fractions 2/7 , 5/14, and 4/21