Agnes paid rent which was of her net salary. She used ½ of the remaining amount make a down payment for a plot. She gave her mother Ksh. 2,500 and did shopping worth Ksh. 7.500 for herself. She s the remainder hich was Ksh. 12,500. How much was the down payment that she made? Without using a calculator, evaluate, giving your answer as a fraction in its simplest form.​