Alamgir spends 30% of his income on scooter petrol. 1/4 of the remaining on house rent and the balance on food. If he spends ...

Alamgir spends 30% of his income on scooter petrol. 1/4 of the remaining on house rent and the balance on food. If he spends Tk.300 on petrol then what is the expenditure on house rent?