You need to know the least common denominator (LCD) of 98 and 7 if you want to add or subtract two fractions with 98 and 7 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 98 and 7 is 98.
Here is a math problem example where you need to know the LCD of 98 and 7 to solve:
3/98 + 2/7 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
98/98 = 1
98/7 = 14
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 1 = 3
2 x 14 = 28
Step 3) Put it all together to solve the problem:
3/98 + 28/98 = 31/98
= 3/98 + 2/7 = 31/98
It's that easy! Once again, the lowest common denominator (LCD) of 98 and 7 is as follows:
98
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