Adds this fraction to the other fraction and returns the result as
a third new fraction that meets the class invariants and without
modifying this or other.
Divides this fraction by the other fraction and returns the result as
a third new fraction that meets the class invariants and does not modify
this or other.
Determines if this Fraction is equal other - handles nulls and when
other refers to a non-Fraction object by returning false (See
How to Override the equals Method for detailed assistance).
Multiplies this fraction to the other fraction and returns the result
as a third new fraction that meets the class invariants and does not
modify this or other.
Subracts the other fraction from this fraction and returns the result
as a third new fraction that meets the class invariants and does not
modify this or other.