Number of days left in April = 18
in May = 31
in June = 30
in July = 15
--
Total number of days = 94
NOTE.--If the rate and principal are given, it is a simple matter to
find the interest, now that we have the time.
Example of the use of Table: What is the time from February 10 to
October 18, in the same year. February 10 is numbered 41, and October 18
is numbered 291; 291 - 41 = 250, _Ans._ This includes the last day, but
not the first. If both days are taken, subtract 40 from 291 = 251,
_Ans._ When February 29 occurs in a term, count an additional day. The
day of the date of a note is not included in its term; thus, required
the last day of grace of a note dated March 24, at 90 days. March 24 =
83; 83 + 93 = 176 = June 25, _Ans._