Nathan has $$4$$ red shirts, $$6$$ yellow shirts and $$8$$ white shirts. What fraction of his shirts are white? Give your answer in its simplest form. 
Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Finding the Rate
White shirts $$=8$$  Total shirts $$=4+6+8=18$$  Fraction of shirts that are white $$=\frac{8}{18}=\frac{4}{9}$$ 