$\"\"$

Write the mixed numbers as an improper fraction. $\"\"$ $\"\"$

Rewrite the expression

$\"\"$

As denominators are same, write sum of numerators over denominator.

$\"\"$

Subtract the numerators.

$\"\"$

Divide out common factor.

$\"\"$

Simplify the expression.

Rewrite the improper fraction $\"\"$ as a mixed number.

Begin by dividing 21 by 4. The remainder will be the numerator of the

mixed number’s fraction.

$\"\"$ (Rewrite 84 as $\"\"$ . Remainder is 4) $\"\"$

The value of the expression is $\"\"$ .