Question

Ann works 5 1/2 hours, Mary works 6 1/3 hours, and John works 4 1/4 hours. How many combined hours have they worked?

Answer 1

^ is correct it is 16 ¹/12

Answer 2

16 1/12 hours.  To make it easier add up all the whole numbers first then find the common denominator, which is 12. Turn all the fractions into fractions with the denominator of 12 add those up and you shall get 16 1/12.