You need to know the least common denominator (LCD) of 2 and 79 if you want to add or subtract two fractions with 2 and 79 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 2 and 79 is 158.
Here is a math problem example where you need to know the LCD of 2 and 79 to solve:
3/2 + 2/79 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
158/2 = 79
158/79 = 2
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 79 = 237
2 x 2 = 4
Step 3) Put it all together to solve the problem:
237/158 + 4/158 = 241/158
= 3/2 + 2/79 = 241/158
It's that easy! Once again, the lowest common denominator (LCD) of 2 and 79 is as follows:
158
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