If a carpenter covers 3/5 of the house in carpet and 2/7 of the house in tile. What fraction of the remaining floors are wood

Question

I need this answer in two steps. I am in 5th grade...help

Answer 1

The remainder (using 1 as 100% of the entire house) is

1-3/5-2/7

1-21/35-10/35

1-31/35

35/35-31/35

4/35