Step 1: The total salary of 3 workers = 3 × 95 = 285 Rs.
Step 2: The combined salary of the first two workers = 115 + 65 = 180 Rs.
Step 3: The salary of the 3rd worker:
\[ 285 - 180 = 105 \text{ Rs.} \]
Arun’s present age in years is 40% of Barun’s. In another few years, Arun’s age will be half of Barun’s. By what percentage will Barun’s age increase during this period?