How to Find a common denominator to add fractions

In this video the tutor shows how to add fractions. Fractions are numbers in the form a/b, where a and b are normal numbers. He shows that to add two fraction we need their denominators to be same. If they are not same we need to take their least common multiple and change the fractions so that they have equal denominators. Now the numerators of these fractions can be directly added and the resultant fraction contains this numerator along with the original common denominator. Now this fraction can be further reduced if wanted. This video shows how to add two fractions.