Ramesh's salary has increased from Rs. 18,00,000 to Rs. 22,00,000. Find the percentage increase in the salary.

Given: Initial salary = Rs. 18,00,000

Increased salary = Rs. 22,00,000

∴ Increase in salary = Rs. 22,00,000 – Rs. 18,00,000 = Rs. 4,00,000

So, the percentage increase in salary

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

$=\left(\frac{4,00,000}{18,00,000}\right)\times 100$

$=22.22\%$

Therefore, the percentage increase in salary is 22.22%.