Question

How do you convert 100 millimeters to meters?

Answer 1

100 mm = 0.1 m

Explanation:

Let `x` represent the unknown count of metres

Known: 1000 millimetres (mm) = 1 metre (m)

Using the method of ratios:

`("metres")/("millimetres") -> ("m")/("mm") = 1/1000`

So we need to solve for:

`("m")/("mm") = 1/1000 -= x/100`
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Note:
In ratio, for multiply or divide, what you do to the bottom you do to the top.
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We need to change 1000 into 100

`=>("m")/("mm") -= (1-:10)/(1000-:10) -= x/100`

`=>("m")/("mm")=0.1/100= x/100`