The statement is not always true.
For Example...
The LCM of 6 and 8 is not the product of the two numbers
6*8= 48
48 is not the LEAST common multiple
Multiples of 6 are...
6,12,18,24,30,36,42,48...
Multiples of 8 are....
8,16,24,32,40,48...
The least common multiple is 24 not 48 even though they are both common multiples.
In general, this would be a ratio. However, if the ratio is the number of items with specific characteristic to the total number of elements, then this would be a probability. The dividend is the numerator, and the divisor is the denominator. For example, if there are 5 white balls out of 6 balls, the probability of getting a white ball would be 5/6. The dividend here is 5.
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I believe your answer is:

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Here’s why:
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Hope this helps you. I apologize if it’s incorrect.
Answer:
C
Step-by-step explanation:
S= (2M-15)=185
2m=185+15= 200
m=200÷2= 100cm-C