lcm of 12 and 20 — step-by-step solution

To calculate the LCM (least common multiple), we first decompose the numbers into prime factors.

12

2^{2} \times 3

20

2^{2} \times 5

We keep every prime factor that appears, with its greatest exponent.

▶

ppcm (12, 20)

2^{2} \times 3 \times 5

60