21 decimeters in feet

Conversion formula
How to convert 21 decimeters to feet?

We know (by definition) that: $1\mathrm{dm}\approx 0.32808399\mathrm{ft}$

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

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

Conclusion: 21 ⁢ dm ≈ 6.88976379 ⁢ ft

Conversion in the opposite direction

The inverse of the conversion factor is that 1 foot is equal to 0.145142857142857 times 21 decimeters.

It can also be expressed as: 21 decimeters is equal to $\frac{1}{\mathrm{0.145142857142857}}$ feet.

Approximation

An approximate numerical result would be: twenty-one decimeters is about six point eight eight feet, or alternatively, a foot is about zero point one five times twenty-one decimeters.