A man spends 1/3

of his salary on accommodation and 2/5
of the remainder on food. What
fraction is left for other purposes?

3 answers

salary ---- x

fraction of salary for rent = (1/3)x , leaving 2/3 x
food = (2/5)(2/3)x = (4/15)x

amount spent so far = (1/3)x + (4/15)x = (3/5)x

leaving him with 2/5 of his salary for other things.
A teacher spent 11/30 on food and 9/20 on traveling what fraction of his salary he spend on food and traveling
73/15