90 decimeters in kilometers

Conversion formula
How to convert 90 decimeters to kilometers?

We know (by definition) that: $1\mathrm{dm}=0.0001\mathrm{km}$

We can set up a proportion to solve for the number of kilometers.

Now, we cross multiply to solve for our unknown $x$:

Conclusion: 90 ⁢ dm = 0.009000000000000001 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 111.111111111111 times 90 decimeters.

It can also be expressed as: 90 decimeters is equal to $\frac{1}{\mathrm{111.111111111111}}$ kilometers.

Approximation

An approximate numerical result would be: ninety decimeters is about zero point zero one kilometers, or alternatively, a kilometer is about one hundred and eleven point one zero times ninety decimeters.