Which are the real no(s),,,,rational no(s),,,, natural no(s)??????Plz. give me a concept on it...

In mathematics, a real number is a value that represents a quantity along a line. ... The real numbers include all the rational numbers, such as the integer −5 and the fraction 4/3, and all the irrational numbers.
a rational number is any number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number.
natural numbers are only the positive integers like 1,2,3 etc . 
HOPE IT CLEARS ..
 

real numbers includes the all rational numbers,but rational numbers is express that p/q format here q is not equal to 0,Natural numbers are all positive numbers.