how to add mixed fractions with unlike denominator

1 4/5 + 1 2/3

1 find the lowest common multiple 5,10,15 3,6,9,12,15

2 multiply 4x3=12 2x5=10

3 add the whole numbers 1+1=2

4 combine 12/15+ 10/15= 22/15=1 7/15

1+1+1=3

3 7/15