The primary use of the LCM in math is in finding a common denominator of two fractions,
in order the add or subtract them. That's right, the common denominator of two fractions *IS*
the LCM of the two denominators.

This means if you knew the denominators of two fractions you are trying to add, the LCM of the two denominators will be the common denominator. The lesson here will show you how to use the LCM in this way.

This means if you knew the denominators of two fractions you are trying to add, the LCM of the two denominators will be the common denominator. The lesson here will show you how to use the LCM in this way.

`cd=`

to compute the common denominator from the LCM.
Type your code here:

See your results here:

This program will not run! First, choose num1, den1, and num2, den2 (the numerator and denominator of your two fractions).
Try 8/21 and 5/6 to start (or num1=8, den1=21, num2=5, den2=6). Next, finish the

`cd=`

line to compute the common denominator using the discussion above.