equals$($o: Object$)->$ boolean Returns true if the values are equal, and false if not.

Rationals are comparable only with Rationals and Numbers $($see: java.lang.Number$).$

A Rational value should be $$equal$$ to a single$-$precision floating$-$point value if their difference is strictly less than $2-20.$

A Rational value should be $$equal$$ to a double$-$precision floating$-$point value if their difference is strictly less than $2-40.$