721 decimeters in kilometers

Conversion formula
How to convert 721 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: 721 ⁢ dm = 0.0721 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 13.869625520111 times 721 decimeters.

It can also be expressed as: 721 decimeters is equal to $\frac{1}{\mathrm{13.869625520111}}$ kilometers.

Approximation

An approximate numerical result would be: seven hundred and twenty-one decimeters is about zero point zero seven kilometers, or alternatively, a kilometer is about thirteen point eight six times seven hundred and twenty-one decimeters.