You need to know the least common denominator (LCD) of 77 and 38 if you want to add or subtract two fractions with 77 and 38 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 77 and 38 is 2926.
Here is a math problem example where you need to know the LCD of 77 and 38 to solve:
3/77 + 2/38 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
2926/77 = 38
2926/38 = 77
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 38 = 114
2 x 77 = 154
Step 3) Put it all together to solve the problem:
114/2926 + 154/2926 = 268/2926
= 3/77 + 2/38 = 268/2926
It's that easy! Once again, the lowest common denominator (LCD) of 77 and 38 is as follows:
2926
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