"Dek estas dekono de cent."

Translation: Ten is a tenth of one hundred.

[Nvirjskly]

Why is "de" used here instead of "da"?

[BigMac_ComboMeal]

Because "dek" is part of "cent". (Note: I am by no means fluent in Esperanto)

[potatoking42]

I think it's because it's a definite quantity?

[stephbutler19]

10 percent = 1 tenth

[domsalazar0]

Couldn't decide if it was "Ten is a tenth of one hundred" or "Ten is one tenth of a hundred". I guess I guessed right.

[domsalazar0]

Update: it works either way