You need to know the least common denominator (LCD) of 38 and 4 if you want to add or subtract two fractions with 38 and 4 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 38 and 4 is 76.
Here is a math problem example where you need to know the LCD of 38 and 4 to solve:
3/38 + 2/4 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
76/38 = 2
76/4 = 19
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 2 = 6
2 x 19 = 38
Step 3) Put it all together to solve the problem:
6/76 + 38/76 = 44/76
= 3/38 + 2/4 = 44/76
It's that easy! Once again, the lowest common denominator (LCD) of 38 and 4 is as follows:
76
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