Question

Johnetta simplified seven over nine divided by three over eight.; her work is shown below. Identify where she made her error.

Original division problem: seven over nine divided by three over eight.

Step 1: seven over nine multiplied by three over eight.

Step 2: seven times three over nine times eight.

Step 3: twenty-one over seventy-two.

Step 4: seven over twenty-four.

Answer 1

To change a division of fractions to a multiplication problem, you multiply by the reciprocal of one of the numbers (use the KFC rule of Keep, Flip, Change). Keep 7/9, flip the sign (division to multiplication), and change 3/8.

Johnetta should have done 7/9 times 8/3, which would be 56/27.

step 1 is wrong

Answer 2

She made an error in step 1.

To change a division of fractions to a multiplication problem, you multiply by the reciprocal of one of the numbers (use the KFC rule of Keep, Flip, Change). Keep 7/9, flip the sign (division to multiplication), and change 3/8.

Johnetta should have done 7/9 times 8/3, which would be 56/27.

(Hope this helps) Sky :)