Question

1/12+1/15 = how much

Answer 1

As the LCM of 12 and 15 is 60

Then

(5+4)/60

9/60

3/20

Answer 2

lcm of 12,15=60
1×5/12×5+1×4/15×4
=5/60+4/60
=9/60
=3/20