A sum of money becomes \(\frac{7}{6}\) of itself in 3 years at a certain rate of simple interest. What is the rate per annum?

A sum of money becomes \(\frac{7}{6}\) of itself in 3 years at a certain rate of simple interest. What is the rate per annum?
एक धनराशि साधारण ब्याज की एक निश्चित दर पर 3 वर्षों में स्वयं की \(\frac{7}{6}\) हो जाती हैं। प्रति वर्ष दर हैं।

\(5\frac{5}{9}\) % \(6\frac{5}{9}\) % 18 % 25 %