How do you find the LCD for these fractions 3/4c & 5/6ct

Question

also is the LCD for 4/15 & 1/9 (45)?

Answer 1

is that 3/(4c) and 5/(6ct) or the way you typed it?

then the LCD = 12ct

for you second question, yes it is 45

Answer 2

3/4c,5/6ct