by Rational Numbers
A Rational Number can be written as a Ratio of two integers (ie a simple fraction).
Example: 1.5 is rational, because it can be written as the ratio 3/2
Example: 7 is rational, because it can be written as the ratio 7/1
Example 0.333… (3 repeating) is also rational, because it can be written as the ratio 1/3
Irrational numbers
But some numbers cannot be written as a ratio of two integers they are called Irrational Numbers.
π (Pi) is a famous irrational number
π = 3.1415926535897932384626433832795… (and more)
We cannot write down a simple fraction that equals Pi.
The popular approximation of 22/7 = 3.1428571428571… is close but not accurate.
