If a man was to sell his table for Tk. 600, he would lose 20%. To gain 20% he should sell it for:

Question: If a man was to sell his table for Tk. 600, he would lose 20%. To gain 20% he should sell it for:

Solution:
Let the Cost price of the table be = x.

∴ Selling price = x - 20% of x
⇒ 600 = x - (20x/100)
⇒ 600 = 80x/100
⇒ 80x = 60000
⇒ x = 60000/80
∴ x = 750

Now, To gain 20% = 750 + 20% of 750
= 750 + 150
= Tk. 900