4 hours
So we know she traveled a full 2 hours there and full hour back so we know that so far it’s been a 3 hour trip
Then getting into the fractions 1/3 +2/3 = 1
Since they have the same denomination (bottom number) we can’t just add the numerators across (top numbers) which gives us 3/3.
So any number over its self equals 1.
So now we know she traveled an additional hour so all that’s left is to add the first 3 hours to the last hour which gives us 4 hours
2 1/3 + 1 2/3
2+1= 3
1/3 + 2/3 = 3/3 = 1
3 + 1 = 4
So in total it was 4 hours