Ravi's salary was increased by 50%. After some time, his new salary was also increased by 50%. Find his overall percentage gain in salary.

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Let Ravi's original salary be Rs. 100.

First increase: 50% of 100 = 50. New salary = 100 + 50 = 150.

Second increase: 50% of 150 = 75. New salary = 150 + 75 = 225.

Overall gain = Final salary - Original salary = 225 - 100 = 125.

Percentage gain = (125 / 100) × 100% = 125%.

Alternatively, for successive percentage increases:
Overall increase = a + b + (ab/100), where a and b are the two successive increases.
Here, a = 50%, b = 50%.
So, overall increase = 50 + 50 + (50×50)/100 = 100 + 25 = 125%.

Therefore, the correct answer is 125%.

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