Same pattern as Flour — Mrs Tan's cake and cookies. New numbers, new story. Try each one on paper, then check the working below — or watch it drawn out, the same way the problem above is.
Question 1
Mr Ong earns $1200 a month. He spent 1/2 of it on rent and 1/3 of the remainder on groceries. How much money did he have left?
Work it out on paper, then check below. ▶ See the working
Question 2
A painter had 20 litres of paint. He used 3/4 of it to paint the walls and 1/5 of the remainder to paint the door. How many litres of paint were left?
Work it out on paper, then check below. ▶ See the working