4.3 Calculate The Exact Number of Days ...

It is common for loans to be given in certain number of days, such as 90 days or 120 days from a given date or a loan may be due on a fixed date such as February 24. In applying the I = PRT formula, we need to find the number of days from one date to another by referring to the number of each day of the year table.

Example 12
Find the number of days from February 10 to August 25.

Solution:

1.	Find 10 at the leftmost column of the number of each day of the year table.
2.	Go across that row until it intersects with the column headed by February.
3.	The number of that intersection is 41, meaning that February 10 is on the 41st day of the year.
4.	Next find August 25, which is 237th day of the year.
5.	Deduct the difference in day of the year to find the number of days in the loan period:

4.3 Calculate The Exact Number of Days ...

Example 13
Find the number of days from March 24 to July 24.

Solution:

You may also use months as the time period since the date falls on the same date in different months, which is 4 months difference.

4.3 Calculate The Exact Number of Days ...

Example 14
Find the number of days from April 7 to August 20.

Solution:

4.3 Calculate The Exact Number of Days ...

Example 15
Find the number of days from November 10 to July 5 of the following year.

Solution:
This question requires different approach from the previous examples, as it involves two different years.

1.	Find the number of days left in that year from November 10 to December 31.
2.	Then, add the days with the next year to find the total.

4.3 Calculate The Exact Number of Days ...

Example 16
Find the number of days from October 13 to May 22 of the following year.

Solution: