Yes! This is a simple module, isn't it? As we saw earlier, there are $$2$$ atoms of Hydrogen and $$1$$ atom of Oxygen in 1 molecule of water. $$2$$ atoms of Hydrogen weigh $$2 \, \mathrm{amu}$$, and $$1$$ atom of Oxygen weighs $$16 \, \mathrm{amus}$$
If you have forgotten, let us recall what proportion means. If a mixture is made up of $$4 \, \mathrm{kgs}$$ of Object A, and $$8 \, \mathrm{kgs}$$ of Object B, the proportion of A to B in the mixture by weight is $$4:8 = \frac{4}{8} = 1:2$$.