Any one - it will depend on the situation.
It usually represents a part of a whole.
where could you find a pentagon in the real world
Any time that anything is shared - even if unequally.
If you are talking about the fraction bar in mathematics, the "fraction bar" is the real name. It is sometimes called a vinculum (although this is a misuse of the word). The fraction bar in amateur radio, also known as the forward slash is officially known as the "fraction bar."
Some real numbers can be expressed as a rational fraction.
You do not do anything. An improper fraction IS a real number.
Yes. A real number is any comprehendable number, from negative infinity to positive infinity. A rational number is any number that can be the answer to a division equation; an integer, fraction, or a decimal. An irrational number is any number that cannot be expressed as a fraction; such as exponents.
No. A quotient is the result of a division. You can divide any real number by any other real number except zero. Most quotients are not whole numbers.Not always because the quotient could be a decimal or a fraction.
The line in a fraction can be read as "divided by." -4 divided by 15 is the same as -4/15
A fraction is just a number. It's as real as any whole number (or decimal).
Fractions are real numbers.
0.1 is a real number and 1/10 is a fraction. It is a proper fraction.