You need to know the least common denominator (LCD) of 3 and 71 if you want to add or subtract two fractions with 3 and 71 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 3 and 71 is 213.
Here is a math problem example where you need to know the LCD of 3 and 71 to solve:
3/3 + 2/71 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
213/3 = 71
213/71 = 3
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 71 = 213
2 x 3 = 6
Step 3) Put it all together to solve the problem:
213/213 + 6/213 = 219/213
= 3/3 + 2/71 = 219/213
It's that easy! Once again, the lowest common denominator (LCD) of 3 and 71 is as follows:
213
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.