$\dfrac{3}{5}$ × $\dfrac{8}{27}$ × $\dfrac{5}{3}$
$=$ $\dfrac{3 × 8 × 5}{5 × 27 × 3}$ - Gạch 3 và 5, vì trùng nhau.
$=$ $\dfrac{8}{27}$
cách khác:
$\dfrac{3}{5}$ × $\dfrac{8}{27}$ × $\dfrac{5}{3}$
$=$ $(\dfrac{3}{5}$ × $\dfrac{5}{3})$ × $\dfrac{8}{27}$
$=$ $\dfrac{8}{27}$