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What percentage of simple interest per annum did Anu pay to Gowtham?
 
i) Anu borrowed \(₹\) 8000 from Gowtham for 3 years.
 
ii) Anu returned \(₹\) 8300 to Gowtham and settled the loan.
 
The rate of interest Anu paid \(=\)______\(\%\)