You need to know the least common denominator (LCD) of 77 and 60 if you want to add or subtract two fractions with 77 and 60 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 77 and 60 is 4620.
Here is a math problem example where you need to know the LCD of 77 and 60 to solve:
3/77 + 2/60 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
4620/77 = 60
4620/60 = 77
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 60 = 180
2 x 77 = 154
Step 3) Put it all together to solve the problem:
180/4620 + 154/4620 = 334/4620
= 3/77 + 2/60 = 334/4620
It's that easy! Once again, the lowest common denominator (LCD) of 77 and 60 is as follows:
4620
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