20% of food is eater. 1 divided by 5 is 0.2. You move the decimal 2 unites which would be 20.
The value is

or

, since it is in the tenths place.
Yes. Any number that can be written as a fraction is defined as rational.
DATES: The rule amendments will become effective October 29, 1999. Section IV of this release contains information on compliance dates.