Annual sales of Ramesh increased from Rs. 5,00,000 to Rs. 8,00,000. Find the percentage increase in the sale.

Given: Initial sale of Ramesh = Rs. 5,00,000

Increased sale = Rs. 8,00,000

∴ Increase in sales = Rs. 8,00,000 – Rs. 5,00,000 = Rs. 3,00,000

So, the percentage increase in sale

$=\left(\frac{\mathrm{Increase} \mathrm{in} \mathrm{sales}}{\mathrm{Initial} \mathrm{sale}}\right)\times 100$

$=\left(\frac{3,00,000}{5,00,000}\right)\times 100$

$=60\%$

Hence, the percentage increase in sales is 60%.