An organic compound undergoes first order decomposition. The time taken for its decomposition to $\frac{1}{8}$ and $\frac{1}{10}$ of its initial concentration are ${\mathrm{t}}_{\frac{1}{8}}$ and ${\mathrm{t}}_{\frac{1}{10}}$ respectively. What is the value of $\frac{\left[{\mathrm{t}}_{\frac{1}{8}}\right]}{{\mathrm{t}}_{\frac{1}{10}}}\times 10$ ?

(take $\text{lo}{\text{g}}_{10}2=0.3$ )