Answer:
60
Step-by-step explanation:
The LCM of 15 and 20 is 60. To find the LCM (least common multiple) of 15 and 20, we need to find the multiples of 15 and 20 (multiples of 15 = 15, 30, 45, 60; multiples of 20 = 20, 40, 60, 80) and choose the smallest multiple that is exactly divisible by 15 and 20, i.e., 60.