Higher Paper 2

\[ \begin{aligned} &\text{Liam is running a concert to raise funds for a school project.} \\ &\text{He spends £90 on refreshments, £150 on hall hire and £60 on advertising.} \\ &\text{He sells 40 tickets for the concert at £10 each.} \\ &\\ &\text{Work out the percentage profit Liam makes.} \end{aligned} \]