LCD(20, 19) = 380.
LCM(6, 20, 19) = 1140
20 is.
The Common Denominator For 9 and 19 Is 177
The LCD of 9/20 and 19/46 is 460.
A common denominator of 20 and 30 is 600. This is NOT the least common denominator, though.
7/15 = 28/60 19/20 = 57/60
1/5 + 3/4 First you have to find the common Denominator. The common denominator is 20. 1/5 = 4/20 (5x4=20, so you have to multiply the 1 by 4 as well) 3/4=15/20 (4x5=20 and 3x5=15) Now that you know your common denominator is 20, you can now add your fractions. 4/20 + 15/20 = 19/20 (you only add the numerator, the denominator stays the same) so, your answer is...... 19/20
I am guessing you mean the least common denominator, which is the LCM of the denominators 4 and 20. The answer is 20.
A common denominator is 209, as is any multiple of 209.
A common denominator, though not the least one, is 12*20 = 240.
A common denominator, though the least, is 260.
The answer is 20