The numbers are coprime so their LCD is their product which is 7*5*2 = 70
280
Somone put 30, but seven doesnt go into it
The least common denominator of five sixths and one fourth is: 12.
The least common denominator of three fourths and five sixths is twelve.
Denominator of seven eights, ie of fifty six is 1. The denominator of five sixths is 6 so the common denominator is 6.
A common denominator, though not the least one, is 110.
the answer is five
20
420
210
Which you don't want. You want the least common denominator, which is 360.
21