Eduardo owned 6/7 of a family business. He sold 1/5 of the business to his son. What portion of the business does he still own?

Is this correct

6/7 - 1/5 =

30/35-7/35=23/35

yes, if he sold 1/5 of the whole business, not just the 6/7 he owned.

Yes, that is correct.

Yes, your calculation is correct. To determine the portion of the business that Eduardo still owns, you need to subtract the portion he sold to his son (1/5) from the portion he originally owned (6/7).

To subtract fractions, you need to have a common denominator. In this case, the least common denominator is 35 (the product of 7 and 5).

To convert 6/7 and 1/5 into fractions with a denominator of 35, multiply the numerator and denominator of each fraction by the appropriate factor:

6/7 * (5/5) = 30/35
1/5 * (7/7) = 7/35

Now that both fractions have a denominator of 35, you can subtract them:

30/35 - 7/35 = (30 - 7)/35 = 23/35

Therefore, Eduardo still owns 23/35 of the family business.