Problem : 
Reduce 45/18 to lowest terms.
5/2
 
Problem : 
Reduce 7/49 to lowest terms.
1/7
 
Problem : 
Reduce 30/105 to lowest terms.
2/7
 
Problem : 
What is the least common denominator of 6/11 and 9/2?
22
 
Problem : 
What is the least common denominator of 7/16 and 1/6?
48
 
Problem : 
What is the least common denominator of 2/9 and 4/27?
27