Mrs. henderson had 7/12dozen eggs in her refrigerator. then she used 1/6 dozen eggs to make a cake. what fraction of a dozen is left?

Ok so to find the eggs left we need to subtract but with fractions, you need a common denominator. You can multiply 1/6 by 2 because 6·2=12 which will be the same denominator as 7/12. You must multiply the numerator by 2 as well so 1/6· 2/2= 2/12. Now subtract 7/12 - 2/12 and you have 5/12 eggs left. :)

When subtrating you need to have the same denominators 1/6=2/12 7/12 - 2/12= 5/12 left