Find Least Common Multiple of 455, 117 and 338 using ladder method..

LCM( 455, 117, 338 ) = 106470

Step 1 : Place the numbers inside division bar:

Step 2 : Find a prime number which can divide at least two of your numbers.

In this example we can divide by 13. If any number is not divisible by 13 write it down unchanged.

Step 4 : LCM is a product of numbers into L shape.

LCM = 13 · 35 · 9 · 26 = 106470

This solution can be visualized using a Venn diagram.

The LCM is equal to the product of all the numbers on the diagram.