You need to know the least common denominator (LCD) of 25 and 4 if you want to add or subtract two fractions with 25 and 4 as denominators.
The least common denominator, also called lowest common denominator (LCD), of 25 and 4 is 100.
Here is a math problem example where you need to know the LCD of 25 and 4 to solve:
3/25 + 2/4 = ?
Step 1) Take the LCD and divide each denominator by it as follows:
100/25 = 4
100/4 = 25
Step 2) Multiply each nominator with the respective answers from Step 1:
3 x 4 = 12
2 x 25 = 50
Step 3) Put it all together to solve the problem:
12/100 + 50/100 = 62/100
= 3/25 + 2/4 = 62/100
It's that easy! Once again, the lowest common denominator (LCD) of 25 and 4 is as follows:
100
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