Question

How do the GCF, divisibility and LCM connect to fractions

Answer 1

lets say you're doing addition

1/5 + 1/2

you can't add them directly until you find the common denominator. You can use LCM(lowest common multiple)
for these it is ten.

so

2/10 + 5/10 = your anwer

Answer 2

Thank you, Angel