Joanne earns $720 a week. She spends 1 3 of her money on groceries and household goods and 3 4 of the remaining money on rent. How much money does she spend on rent, groceries and household goods? Marshall Cavendish International (Singapore) Private Limited. 164 C h a p t e r 4 M u l t i p l y i n g a n d D i v i d i n g F r a c t i o n s a n d M i x e d N u m b e r s