You need to know the least common denominator (LCD) of 4 and 74 if you want to add or subtract two fractions with 4 and 74 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 4 and 74 is 148.
Here is a math problem example where you need to know the LCD of 4 and 74 to solve:
3/4 + 2/74 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
148/4 = 37
148/74 = 2
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 37 = 111
2 x 2 = 4
Step 3) Put it all together to solve the problem:
111/148 + 4/148 = 115/148
= 3/4 + 2/74 = 115/148
It's that easy! Once again, the lowest common denominator (LCD) of 4 and 74 is as follows:
148
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