-0.8 (negative zero point eight).
The idea is to subtract, in this case, 2747 minus 19.
38
Subtract a negative 1. 19 - (-1) = 20
Today is Monday, May 19, 2014. If you subtract 27 weeks from today's date, or 189 days, the date would be Monday, November 11, 2013.
If you subtract 19 from 25, you get a result of 6. This is calculated by adding 6 to 19.
27
Subtract 1.
24
13
-1328
30
13