You need to know the least common denominator (LCD) of 53 and 7 if you want to add or subtract two fractions with 53 and 7 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 53 and 7 is 371.
Here is a math problem example where you need to know the LCD of 53 and 7 to solve:
3/53 + 2/7 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
371/53 = 7
371/7 = 53
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 7 = 21
2 x 53 = 106
Step 3) Put it all together to solve the problem:
21/371 + 106/371 = 127/371
= 3/53 + 2/7 = 127/371
It's that easy! Once again, the lowest common denominator (LCD) of 53 and 7 is as follows:
371
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