You need to know the least common denominator (LCD) of 74 and 7 if you want to add or subtract two fractions with 74 and 7 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 74 and 7 is 518.
Here is a math problem example where you need to know the LCD of 74 and 7 to solve:
3/74 + 2/7 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
518/74 = 7
518/7 = 74
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 7 = 21
2 x 74 = 148
Step 3) Put it all together to solve the problem:
21/518 + 148/518 = 169/518
= 3/74 + 2/7 = 169/518
It's that easy! Once again, the lowest common denominator (LCD) of 74 and 7 is as follows:
518
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