You need to know the least common denominator (LCD) of 4 and 75 if you want to add or subtract two fractions with 4 and 75 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 4 and 75 is 300.
Here is a math problem example where you need to know the LCD of 4 and 75 to solve:
3/4 + 2/75 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
300/4 = 75
300/75 = 4
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 75 = 225
2 x 4 = 8
Step 3) Put it all together to solve the problem:
225/300 + 8/300 = 233/300
= 3/4 + 2/75 = 233/300
It's that easy! Once again, the lowest common denominator (LCD) of 4 and 75 is as follows:
300
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