You need to know the least common denominator (LCD) of 20 and 1 if you want to add or subtract two fractions with 20 and 1 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 20 and 1 is 20.
Here is a math problem example where you need to know the LCD of 20 and 1 to solve:
3/20 + 2/1 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
20/20 = 1
20/1 = 20
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 1 = 3
2 x 20 = 40
Step 3) Put it all together to solve the problem:
3/20 + 40/20 = 43/20
= 3/20 + 2/1 = 43/20
It's that easy! Once again, the lowest common denominator (LCD) of 20 and 1 is as follows:
20
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.