375
To find the Least Common Denominator (LCD) of 15 and 125 you could make a list of their multiples until you find a number common to both lists:
15: 15, 30, 45, 60, 75, 90, 105, 120, 135, ....
125: 125, 250, ...
This method can sometimes be tedious. A more 'scientific method is to find the prime factorization of each number|
15 = 3x5
125 = 5x25 = 5x5x5
The LCD has to have enough factors in it to make each of the numbers. There has to be 1 three and 3 fives.
LCD = 3x5x5x5 = 3x125 = 375.
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There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of a pair of fractions.
15/125 = 0.12
The LCD of 13, 14 and 15 is 2730 The LCD of 1/3, 1/4 and 1/5 is 60
15 is what percent of 125= 15 / 125= 0.12Converting decimal to a percentage: 0.12 * 100 = 12%
15% out of 125 = 0.15 out of 125 = 0.0012 or 0.12%