When calculating simple interest, what must you do if you want to invest for months instead of years?

If investment is made for months instead of years we have to convert years to months by multiplying 12 with the given number of years.

Solution:

The formula for calculating the simple interest is

Here, SI is Simple Interest; P is principal; N is the number of years and R is the rate of interest

Now, if we invest for months instead of years then to find the simple interest, we must convert the units in years to months.

1 year has 12 months;

So, we have to multiply 12 to the given number of years.

the answer is b