LCM( 3, 8 ) = 24
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 3, b = 8 and GCD(3, 8) = 1.
$$ \text{LCM} (3, 8) = \frac{ 3 \cdot 8 }{ \text{GCD}(3,8)} = \frac{ 24 }{ 1 } = 24 $$