What will be the interest earned on ₹ 1980 in five years @ 8% simple interest per annum?

Given parameters:
* Principal ($P$) $=\text{₹ }1980$
* Time ($T$) $=5\text{ years}$
* Rate ($R$) $=8\%\text{ per annum}$

Use the standard Simple Interest formula:

$$\text{SI}=\frac{P\times R\times T}{100}$$

$$\text{SI}=\frac{1980\times 8\times 5}{100}$$

$$\text{SI}=\frac{1980\times 40}{100}$$

$$\text{SI}=198\times 4=792$$

Thus, the simple interest earned is $\text{₹ }792$.