What is the inverse of the lowest common denominator fraction?

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What is the inverse of the lowest common denominator fraction?

L.C.D. of 1/6 1/10 1 1/18 1/21

2006-09-01 07:58:32 · 2 answers · asked by shariff B 1 in Science & Mathematics ➔ Mathematics

2 answers

LCD=630
(105+63+35+30)/630
inverse=630/233

2006-09-01 08:02:22 · answer #1 · answered by raj 7 · 0⤊ 0⤋

take the Least Common Multiple of
6 = 2*3
10 = 2*5
1 =
18 = 2*3*3
21 = 3*7

Each factor occurs in the LCM as often as it occurs at most in any of the numbers listed. Therefore it must be

2*3*3*5*7 = 630

The fractions, written with LCD, are therefore

105/630
63/630
630/630
35/630
30/630

2006-09-01 08:03:27 · answer #2 · answered by dutch_prof 4 · 0⤊ 0⤋