Answer
The Law of Definite Proportions states: "All samples of a given compound, regardless of their source or how they were prepared, have the same proportions as their constituent elements."
Work Step by Step
This means that a given chemical compound always has the same proportions of its constituent elements no matter where it came from or how it was derived from that source. This is meant to be expressed as a ratio of masses, which will be the same for every sample of a given chemical compound.
