2/3-1/6-4/9---------------7/9-5/12-5/18

Question

2/3-1/6-4/9---------------7/9-5/12-5/18

Answer 1

1. 2/3-1/6-4/9=4/6-1/6-4/9=27/54-24/54=3/54=1/18
2. 7/9-5/12-5/18=28/36-15/36-10/36=3/36=1/12