21 centiliters in deciliters

Conversion formula
How to convert 21 centiliters to deciliters?

We know (by definition) that: $1\mathrm{centiliter}\approx 0.1\mathrm{dl}$

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

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

Conclusion: 21 ⁢ centiliter ≈ 2.1 ⁢ dl

Conversion in the opposite direction

The inverse of the conversion factor is that 1 deciliter is equal to 0.476190476190476 times 21 centiliters.

It can also be expressed as: 21 centiliters is equal to $\frac{1}{\mathrm{0.476190476190476}}$ deciliters.

Approximation

An approximate numerical result would be: twenty-one centiliters is about zero deciliters, or alternatively, a deciliter is about zero point four eight times twenty-one centiliters.