A and B are two non-zero natural numbers. A divided by B is equal to 0.2. What is the greatest common factor and the least common multiple of a and B?

A and B are two non-zero natural numbers. A divided by B is equal to 0.2. What is the greatest common factor and the least common multiple of a and B?

b÷a=5
So a is a divisor of B
So the greatest common factor is a