Write the mixed numbers as an improper fraction. 
Rewrite the expression
\
To add fractions the denominators must be equal.
\Find the least common denominator (LCD).
\Write the prime factorization of each denominator.
\
Multiply the highest power of each factor in either number.
\
LCD of the fractions is 84.
Rewrite the equivalent fractions using the LCD.
\

Rewrite the expression using the LCD.
\
Denominators are same, write Sum of numerators over denominator. 
Add the numerators.
\
Simplify the expression.
\Rewrite the improper fraction
\
as a mixed number.
Begin by dividing 247 by 84. The remainder will be the numerator of the
\mixed number’s fraction.
\
The sum is
. \ \