What to do if time is in months eg 5 months,and we have find interest quarterly.then what to do

If time is in months eg 5 months.

We will find interest for a month and then it will be multiplied by 3 to find interest quarterly.

 

 

for example : 

10% interest for 5 months then 10%/5 = 2% per month

For quarter it will be 2% × 3 = 6% quarterly