Dan spends 2/5 of his wages on rent and 1/2 on food. if he makes £540 per week, how much money does he have left?

Dan has £54 left

Step-by-step explanation:

Dan's weekly wages are £540.

Then his spending includes (2/5)w + (5/10()w, or (9/10)w, and this is subtracted from Dan's wages:  £540 - (expenses)

                                                    £540 - (9/10)(£540) = £54

Dan has £54 left after having spent 9/10 of his weekly wages on rent and food.