What is the simple interest (in ₹) earned on ₹$12,400$ at $6\%$ per annum for $15$ months?

Given parameters:Principal ($P$) = ₹$12,400$ Rate of Interest ($R$) = $6\%$ per annumTime ($T$) = $15\text{ months}=\frac{15}{12}\text{ years}=\frac{5}{4}\text{ years}$ The formula for simple interest ($\text{SI}$) is:
$$\text{SI}=\frac{P\times R\times T}{100}$$
Substitute the values:
$$\text{SI}=\frac{12400\times 6\times \frac{5}{4}}{100}$$
$$\text{SI}=124\times 6\times \frac{5}{4}$$
$$\text{SI}=31\times 6\times 5$$
$$\text{SI}=31\times 30=930$$
The simple interest earned is ₹$930$.