Hi Omi,
I think there might be a slight language problem here.
The question is not worded very well but I think this is the meaning.
if i take 1/3 away from 300 then i take 1/5 away how much is left
if i take 1/3 (of 300) away from 300 then i take 1/5 (of the resultant value) away how much is left.
1/3*300=100
300-100=200
1/5 of 200 = 40
200-40 = 160