\(Lets \ Find \ the \ Least \ Common \ Multiple \ (LCM) \ of \ 4 \ and \ 30\)
\(|Solve \ by \ using \ Prime \ Factors|\)
\(List \ all \ prime \ factors \ of \ each \ denominator,\)\(and \ find \ the \ union \ of \ these \ primes.\)
\(9:3,3\)
\(12: 2,2,3\)
\(Therefore, the \ LCM \ is \ 2*2*3*3=36\)
