An isotope of chlorine, ${}_{17}^{35}Cl$, exists as a bare nucleus, while another isotope, ${}_{17}^{37}Cl$, exists as a singly-charged positive ion, ${}_{17}^{37}{Cl}^{+}$.

What is the ratio:

$$\frac{{specific\; charge\; of\; the}_{17}^{35}Clnucleus}{{specific\; charge\; of\; the}_{17}^{37}{Cl}^{+}ion}$$

(Assume the mass of each species is represented by its nucleon number multiplied by the atomic mass unit $u$.)