You need to know the least common denominator (LCD) of 70 and 3 if you want to add or subtract two fractions with 70 and 3 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 70 and 3 is 210.
Here is a math problem example where you need to know the LCD of 70 and 3 to solve:
3/70 + 2/3 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
210/70 = 3
210/3 = 70
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 3 = 9
2 x 70 = 140
Step 3) Put it all together to solve the problem:
9/210 + 140/210 = 149/210
= 3/70 + 2/3 = 149/210
It's that easy! Once again, the lowest common denominator (LCD) of 70 and 3 is as follows:
210
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