780 decimeters in kilometers

Conversion formula
How to convert 780 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: 780 ⁢ dm = 0.078 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 12.8205128205128 times 780 decimeters.

It can also be expressed as: 780 decimeters is equal to $\frac{1}{\mathrm{12.8205128205128}}$ kilometers.

Approximation

An approximate numerical result would be: seven hundred and eighty decimeters is about zero point zero eight kilometers, or alternatively, a kilometer is about twelve point eight two times seven hundred and eighty decimeters.