Calculate the ppm or iron in the water?

The iron (55.847 g/mol) in a 650.0 mL sample of a natural water was determined by precipitation of the cation as hydrated Fe2O3. The precipitate was filtered, washed, and ignited in a crucible to form Fe2O3 (MW = 159.69 g/mol). The m of the product was 0.1155 g. Calculate the ppm iron in the water.