You need to know the least common denominator (LCD) of 90 and 2 if you want to add or subtract two fractions with 90 and 2 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 90 and 2 is 90.
Here is a math problem example where you need to know the LCD of 90 and 2 to solve:
3/90 + 2/2 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
90/90 = 1
90/2 = 45
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 1 = 3
2 x 45 = 90
Step 3) Put it all together to solve the problem:
3/90 + 90/90 = 93/90
= 3/90 + 2/2 = 93/90
It's that easy! Once again, the lowest common denominator (LCD) of 90 and 2 is as follows:
90
Find Least Common Denominators
Enter another two numbers below to find the Least Common Denominator.