You need to know the least common denominator (LCD) of 5 and 19 if you want to add or subtract two fractions with 5 and 19 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 5 and 19 is 95.
Here is a math problem example where you need to know the LCD of 5 and 19 to solve:
3/5 + 2/19 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
95/5 = 19
95/19 = 5
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 19 = 57
2 x 5 = 10
Step 3) Put it all together to solve the problem:
57/95 + 10/95 = 67/95
= 3/5 + 2/19 = 67/95
It's that easy! Once again, the lowest common denominator (LCD) of 5 and 19 is as follows:
95
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