You need to know the least common denominator (LCD) of 1 and 43 if you want to add or subtract two fractions with 1 and 43 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 1 and 43 is 43.
Here is a math problem example where you need to know the LCD of 1 and 43 to solve:
3/1 + 2/43 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
43/1 = 43
43/43 = 1
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 43 = 129
2 x 1 = 2
Step 3) Put it all together to solve the problem:
129/43 + 2/43 = 131/43
= 3/1 + 2/43 = 131/43
It's that easy! Once again, the lowest common denominator (LCD) of 1 and 43 is as follows:
43
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