Least Common Denominator (LCD) is generally the lowest whole number which is divisible by both denominator. LCD is the least common multiple (denominators) of the simple fraction. Here LCD Calculator take 2 fractions in the simple form and calculates the LCD.
First let us know what is Denominator?
The base number in the fraction is called as Denominator.
  
$\frac{2}{4}$
and $\frac{1}{8}$

Here 4 and 8 are the denominators.
  • write down the multiples of both the denominator.
  • Find the least common multiple from both the numbers.
  • The Least common multiple will be the LCD.