Liana has £$$24$$ of pocket money saved.  She spends one third of her savings on a $$\text{DVD}$$ and $$25 \%$$ of the remainder on a book.  How much does she have left?  £~\uline{~~~~~~~~~~}~ 
Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Knowing the Base