Real number includes all the rational number , ie integer such as 2, -5 ,etc and fractions such as 2/5, 4/3, etc and all the irrational numbers such as square root of 2 ,pie = 3.14159265...... ,etc. Real number DOES NOT include imaginery numbers . But real numbers and imaginery numbers together form complex numbers. So real numbers are subsets of complex numbers and complex number is the super set.