30
The LCD of 13, 14 and 15 is 2730 The LCD of 1/3, 1/4 and 1/5 is 60
84
84
15.
LCD(5, 14) = 70
The LCD for 1/5 and 4/15 is 15.
As 14 and 5 have no common factor other than 1, lcd of 14 and 5 is 14 × 5 = 70.
The LCD of x, 5, 7, 15 is 105x.
5/7 ÷ 14/15 = 75/98
14/15 + 3/5 = 14/15 + 9/15 = 23/1514/15 + 3/5 = 14/15 + 9/15 = 23/1514/15 + 3/5 = 14/15 + 9/15 = 23/1514/15 + 3/5 = 14/15 + 9/15 = 23/15
It is: 7/15 times 5/14 = 1/6
15