Write the mixed numbers into improper fraction.

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The improper fraction of        ()

The improper fraction of ()

 To add fractions the denominators must be equal.

Find the least common denominator (LCD).

Multiples of 7: 

Multiples of 4: 

The least common multiple of 7 and 4 is 28.

Rewrite each fraction with a common denominator of 28.

Rewrite fractions using the LCD 28.

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                                    (Simplify)

                                             (Subtract: )

Rewrite the improper fraction as a mixed number.

Begin by dividing 509 by 28. The remainder will be the numerator of the

mixed number’s fraction.

(Rewrite 509 as. Remainder is5)

The value of the expression is .