An organic compound undergoes first order decomposition. The time taken for its decomposition to $1/8$ and $1/10$ of its initial concentration are ${\mathrm{t}}_{1/8}$ and ${\mathrm{t}}_{1/10}$ respectively.
What is the value of $\frac{\left[{\mathrm{t}}_{1/8}\right]}{{\mathrm{t}}_{1/10}}$ ?
(take $\mathrm{l}\mathrm{o}{\mathrm{g}}_{10}2=0.3$ )