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 30.
Rewrite the equivalent fractions using the LCD.
\
Rewrite the expression using the LCD.
\
As denominators are same, write difference of numerators over denominator. 
Subtract the numerators.
\
Simplify the expression.
\Rewrite the improper fraction
\
as a mixed number.
Begin by dividing 425 by 30. The remainder will be the numerator of the
\mixed number’s fraction.
\
The difference
.