Question

LCM between
6.5 and 2.5​

Answer 1

List all prime factors for each number.

Prime Factorization of 25 is:

5 x 5  =>  5^2

Prime Factorization of 65 is:

5 x 13  =>  5^1 x 13^1

For each prime factor, find where it occurs most often as a factor and write it that many times in a new list.

The new list is

5, 5, 13

Multiply these factors together to find the LCM.

LCM = 5 x 5 x 13 = 325

In exponential form:

LCM = 5^2 x 13^1 = 325

LCM = 325

Therefore,

LCM(25, 65) = 325

Lastly, move the decimal of the LCM back 1 places to the left:

LCM(6.5 2.5) = 32.5

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Answer 2

Answer:

32.5

Step-by-step explanation:

LCM(2.5, 6.5) = 5×13×2-1 = 65/2 = 32.5 = 65/2

2.5 = 5×2-1

6.5 = 13×2-1

LCM = 5×13×2-1 = 65/2

So in decimal, 32.5