56
60
I think what you might have meant was LCD (Lowest Common Denominator) The LCD for 11/7 and 3/8 is 56 Making equivalent fractions using the LCD: 11/7 becomes 88/56 3/8 becomes 21/56
3
LCD(4, 10) = 20
3
The LCD for 4/7 and 3/5 is 35.
36
The LCD for 3/4 and 4/7 is 28.
77
LCD(7, 11) = 77
3/21 is equal to 1/7, so your question does not make sense.