CCommunity
SI = (P × R × t)/100
SI = Simple interest
P = Principal
R = rate %
t = time in years
Given, Simple interest on a certain sum for 6 years is $(\frac{9}{{25}})$ of the sum
∴ SI = 9P/25
t = 6 years
R =?
$(\Rightarrow \frac{{9P}}{{25}} = \frac{{P \times 6 \times R}}{{100}})$
⇒ R = 900/150 = 6%