Tìm tỉ số a / d biết rằng 8b = 3c

$$\begin{gathered} \frac{1}{2}+\frac{4}{3}\times 0,4 - \left|-\frac{1}{5}\right|\times \frac{2}{3} \\ -\left[(-3)\times {\sqrt{\left(\frac{2}{9}\right)}}^2+\frac{1}{2}÷2\right]+\left|0,5^2\right| \\ \frac{{\left(6\right)}^{12}\times {49}^7}{{14}^{13}\times 9^6} \\ Tìm tỉ số \frac{a}{d}biết rằng \frac{a-b}{d-c}=\frac{3}{8}và 8b=3c \\ \frac{2}{3}-\frac{5}{8}-\left|-\frac{4}{15}\right|+\frac{1}{23}-\frac{5}{24}-\left(-\frac{3}{5}\right)+\left(\frac{-1}{6}\right) \\ {\sqrt{\left(-\frac{5}{6}\right)}}^2-\left|-\frac{2}{3}\right|-0,875-{\left(-2018\right)}^0 \end{gathered}$$