Simple interest on a certain amount is $$\frac{9}{{16}}$$ of the principal. If the numbers representing the rate of interest in percent and time in years be equal, then time, for which the principal is lent out, is -

• A. $5\frac{1}{2}$$ years
• B. $6\frac{1}{2}$$ years
• C. years
• D. $7\frac{1}{2}$$ years