I expect any number you know about at this stage of your Mathematical learning is a real number: The reals include
all integers, positive and negative and zero;
all fractions, positive and negative, including mixed numbers, which of course can be written as improper fractions -- this is the same as saying all numbers which can be written as terminating or recurring decimals;
all other numbers which can be represented as infinite, non-recurring decimals.
e.g. pi = 3.14159265 ... continues indefinitely, and never settles down to a repeating pattern. Computers have calculated it to thousands of decimal places.