how to add two fractions withdifferent denominators together

Two fraction with different denominator can be add by taking L.C.M of denominator eg.- 4/6+6/8. Now if you know how to calculate L.C.M.(of 6&8) then it comes to 24 now divide this L.C.M my by respectively denominators as 24 /6 and 24/8 i.e 4 and 3 now multiply these by respective numerators as 4x4. And 3x6 16 +18 and divide by the L.C.M calculated earlier. Final 34/24 is the answer. Try it in rough and you will understood. Don`t forgot to approve.