LCM( 96, 80 ) = 480
The formula for finding LCM is
$$ \text{LCM} (a, b) = \frac{ a \cdot b }{ \text{GCD}(a,b)} $$In this example we have: a = 96, b = 80 and GCD(96, 80) = 16.
$$ \text{LCM} (96, 80) = \frac{ 96 \cdot 80 }{ \text{GCD}(96,80)} = \frac{ 7680 }{ 16 } = 480 $$