LCM( 10, 75 ) = 150
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 10, b = 75 and GCD(10, 75) = 5.
$$ \text{LCM} (10, 75) = \frac{ 10 \cdot 75 }{ \text{GCD}(10,75)} = \frac{ 750 }{ 5 } = 150 $$