What's the LCD of and ?
Answer
10
20
21
90
968
What's the LCD of and 1?
, so the LCD is 21.
165
What's the LCD of the and ?
35
For this pair of fractions, (a) find the LCD and (b) rewrite each fraction so that its denominator is the LCD you found in (a).
,
LCD: 45
and
LCD: 18
LCD: 180
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and 
?
and 
?
and 
?
and 
?
and 
?
and 1?
, so the LCD is 21.
and 
?
and 
?
, 
and 
, 
and 
, 
and 