Reduced rational nr. should be in standard form. (#1958)
Reduced rational nr. should be in standard form. (#1958)

* Reduced rational should be in standard form.

The current instructors fail to mention that a reduced rational number should always be rendered in standard form (without any negative value at the denominator).

* remove superflous blank lines; fix wording
jmluy/x-common,jmluy/x-common,jmluy/x-common,exercism/x-common,exercism/x-common