You need to know the least common denominator (LCD) of 5 and 51 if you want to add or subtract two fractions with 5 and 51 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 5 and 51 is 255.
Here is a math problem example where you need to know the LCD of 5 and 51 to solve:
3/5 + 2/51 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
255/5 = 51
255/51 = 5
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 51 = 153
2 x 5 = 10
Step 3) Put it all together to solve the problem:
153/255 + 10/255 = 163/255
= 3/5 + 2/51 = 163/255
It's that easy! Once again, the lowest common denominator (LCD) of 5 and 51 is as follows:
255
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