You need to know the least common denominator (LCD) of 38 and 7 if you want to add or subtract two fractions with 38 and 7 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 38 and 7 is 266.
Here is a math problem example where you need to know the LCD of 38 and 7 to solve:
3/38 + 2/7 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
266/38 = 7
266/7 = 38
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 7 = 21
2 x 38 = 76
Step 3) Put it all together to solve the problem:
21/266 + 76/266 = 97/266
= 3/38 + 2/7 = 97/266
It's that easy! Once again, the lowest common denominator (LCD) of 38 and 7 is as follows:
266
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