How to find the simplest common denominator?

2. Divide two numbers by the largest number (the greatest common factor) among the * * * factors.

3. Multiply the obtained two numbers by the greatest common factor,

Example:

40 and 60, find the simplest common denominator.

1.40: 1,2,4,5,8, 10,20,40.

60: 1,2,3,4,5,6, 10, 12, 15,20,30,60.

Maximum common factor: 20

2.40÷20=2 60÷20=3

3.2×3×20= 120