The price of a watch including 8% VAT is Rs.810. What is its basic price?

VAT = 8%

Selling Price = Rs.810

Let × be the base price.

Vat Amount = 8% of x

= 8x/100

Base Price + VAT = Selling Price

× + 8x/100 = 810

108x/100 = 810

× = (810 × 100) / 108

= Rs.750

So, Cost Price of watch is Rs.750