Can anyone tell how to identify rational and irrational numbers? fast please!

An irrational number has endless non-repeating digits to the right of the decimal point. Here are some irrational numbers:  
π = 3.141592 
 = 1.414213
 

A rational number is a number that can be written as a ratio. That means it can be written as a fraction, in which both the numerator (the number on top) and the denominator (the number on the bottom) are whole numbers.

• The number 8 is a rational number because it can be written as the fraction 8/1.
• Likewise, 3/4 is a rational number because it can be written as a fraction.