129 centiliters in deciliters
Result
The conversion result is: 129 centiliters is equivalent to 12.9 deciliters.[1]
Conversion formula
How to convert 129 centiliters to deciliters?
We know (by definition) that: 1 centiliter ≈ 0.1 dl.
We can set up a proportion to solve for the number of deciliters.
1 centiliter / 129 centiliter ≈ 0.1 dl / x dl
Now, we cross multiply to solve for our unknown x:
x dl ≈ (129 centiliter / 1 centiliter) * 0.1 dl → x dl ≈ 12.9 dl
Conclusion:
129 centiliter ≈ 12.9 dl

Conversion in the opposite direction
The inverse of the conversion factor is that 1 deciliter is equal to 0.0775193798449613 times 129 centiliters.
It can also be expressed as: 129 centiliters is equal to 1 / 0.0775193798449613 deciliters.
Approximation
An approximate numerical result would be: one hundred and twenty-nine centiliters is about zero deciliters, or alternatively, a deciliter is about zero point zero eight times one hundred and twenty-nine centiliters.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.