$\"\"$

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: $\"\"$ ) \ \ $\"\"$

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 21 as $\"\"$ . Remainder is 1) $\"\"$

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