You need to know the least common denominator (LCD) of 94 and 42 if you want to add or subtract two fractions with 94 and 42 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 94 and 42 is 1974.
Here is a math problem example where you need to know the LCD of 94 and 42 to solve:
3/94 + 2/42 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
1974/94 = 21
1974/42 = 47
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 21 = 63
2 x 47 = 94
Step 3) Put it all together to solve the problem:
63/1974 + 94/1974 = 157/1974
= 3/94 + 2/42 = 157/1974
It's that easy! Once again, the lowest common denominator (LCD) of 94 and 42 is as follows:
1974
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