All 1963 US $2 bills were printed as red-seal United States Notes. It's possible your bill was exposed to some chemical or something else that bleached the red ink to leave a yellow tone. If so, it's considered to be a damaged bill worth face value only.
There were no yellow seal two dollar bills. The red ink on your note was altered to look yellow.
Depends on year and how low the serial number is.
The percentage of a partial bill really has little to do with its value. Any bill is worth its face value if it contains a complete serial number and any part of the other serial number.
$20
$20
$10
The serial number alone isn't enough to assign value, but rather the series year and the condition. Without more information, it's assumed to be worth one dollar.
Face value.
The value is more dependent on the year (series) of the bill. The serial number by itself isn't enough information.
As you have seen in many other postings, a bill's serial number almost never has anything to do with its value.
$5
The value is determined by the series (date) and condition.