In subtracting fractions with regrouping. what is 7 - 3 1/2?

7/2

Step-by-step explanation:

Step 1:  Convert the mixed fraction to an improper fraction

   3 1/2   is     7/2              (multiply the denominator by the whole number,

                                            then add the numerator, leave that new number

                                             over the original denominator)

Now our expression is 7 - 7/2

Step 2:  Find a common denominator

The common denominator is 2, so multiply 7 by 2/2

7(2/2) - 7/2

     14/2 - 7/2                    (14/2 = 7, but now we can combine fractions)

Step 3:   Add or subtract numerators, here it's subtraction

    14/2 - 7/2 = (14 - 7)/2    = 7/2

27

step-by-step explanation: