IM SO SORRY THIS IS LATE :'(
okay today we did this in class .. so it would be easier for me =P .. i'll put EXACTLY what mr.hanley put
LCD: is the lowest common factor between two or more denominators
WHY(do we use LCD's)?
- it makes fraction operation easier
- makes less mistakes
this is a test question. Its from the test that we did last week. It showed what people did CORRECTLY but not the easy way .. i guess the teachers are trying to make math a little easier ? hmm .. i'll keep thinking that way =P
this is a picture of one of the other examples we did .
sorry this is so messy  stay up tonight