Vinay purchased two bottles for a total of ₹100, and he sells these two bottles at the rate of ₹100 per bottle. What is the overall profit percentage that Vinay had on selling the two bottles?

Vinay purchased two bottles for a total of ₹100.

Total cost price of two bottles = ₹100    Eq.(i)

he sells these two bottles at the rate of ₹100 per bottle.

Total selling price of two bottles = ₹$$100\times2$$ = ₹200    Eq.(ii)

Overall profit percentage that Vinay had on selling the two bottles = $$\frac{\left(Eq.(ii)-Eq.(i)\right)}{Eq.(i)}\times100$$

= $$\frac{\left(200-100\right)}{100}\times100$$

= $$\frac{100}{100}\times100$$

= 100%