The price of a computer after discount was Tk. 12000. If the discount was 20%, what was the original sales price?

Question: The price of a computer after discount was Tk. 12000. If the discount was 20%, what was the original sales price?

Solution:
In 20% discount,
Discount price 80 taka when original price 100 taka
∴ Discount price 1 taka when original price 100/80 taka
∴ Discount price 12000 taka when original price (12000 × 100)/80 taka
= 15000 taka