Ann works 51/2 hours, mary works 61/3 hours, and john works 41/4 hours. how many combined hours have they worked?

The common denominator of these fractions will be 12. So Ann worked 306/12 hours, Mary worked 244/12 hours, and John worked 123 hours, meaning they have worked 673/12 hours together.

Geometric pattern of 2 i’m guessing. not really sure about what you’re asking but i hope this !