“A person’s income rose from Rs. 7800 to Rs. 10500 in 3 years. What is the percentage increase in income?”

"The income increase is 10500-7800=2700. The percentage increase is (2700/7800)×100≈34.62%. Percentage calculations are essential in finance economics and statistics for analyzing growth inflation or investment returns. This problem demonstrates practical applications in budgeting and financial planning ensuring accurate assessment of economic changes in personal or business contexts."