cost price = {100/100-loss% * selling price}
=100/100-20 * 13500
=100/80 * 13500
=1350000/80
=135000/8
=Rs.16875
cost price = Rs.16875
Shashi sells a washing machine for ₹13500. She loses 20 percent in the bargain. What was the price at which she brought it?