You need to know the least common denominator (LCD) of 90 and 5 if you want to add or subtract two fractions with 90 and 5 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 90 and 5 is 90.
Here is a math problem example where you need to know the LCD of 90 and 5 to solve:
3/90 + 2/5 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
90/90 = 1
90/5 = 18
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 1 = 3
2 x 18 = 36
Step 3) Put it all together to solve the problem:
3/90 + 36/90 = 39/90
= 3/90 + 2/5 = 39/90
It's that easy! Once again, the lowest common denominator (LCD) of 90 and 5 is as follows:
90
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.