an irrational number is a number that can't be written as a rational number
a rational number is a number that can be written in form a/b where a and b are integers and b≠0
integers are like -4,-3,-2,-1,0,1,2,3,4 etc
so
an exmple of an irrational number is √2 because it can't be written as the quotient of 2 integers
another one is π
repeating decimals aren't irrational because they can be written as a quotient of 2 numbers, no matter how big they are
example: 0.77777777 etc=7/9
0.223223223223223 etc=223/999
