They're both multiples of 60, which is their greatest common denominator (gcd).
The greatest common factor of the numbers 120 and 180 is 60.
10 is a factor of 20 and 30.
300
The product is: 180
60, 120 and 180, among others.
Because they are divisible by the most numbers.
60, 120, and 180.
60, 120, 180.....
1.5 x 120 = 180
120 + 60 = 180
180 divided by 120 =1.5=150%
75,112