**LCM**of two numbers is the smallest whole number which is a multiple of both the numbers.

The lowest common multiple is found by multiplying all the factors which appear in either (prime) factor list of both numbers.

Multiples of $12$ are $12,24,36,48,60,72,84,96...$ or $12=1×2×2×3$

Multiples of $16$ are $16,32,48...$ or $16=1×2×2×2×2$

The LCM of $12$ and $16$ is $48$ or $1×2_{4}×3=48$.