Define an exact decimal number $$a$$, a pure periodic decimal number $$b$$ and a ultimately periodic decimal number $$c$$.
See development and solution
Development:
$$a=2,654$$
$$b=13,\widehat{187}$$
$$c=19,13\widehat{76}$$
Solution:
$$a=2,654$$
$$b=13,\widehat{187}$$
$$c=19,13\widehat{76}$$