LCM( 30, 8 ) = 120
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 30, b = 8 and GCD(30, 8) = 2.
$$ \text{LCM} (30, 8) = \frac{ 30 \cdot 8 }{ \text{GCD}(30,8)} = \frac{ 240 }{ 2 } = 120 $$