iron ore weighing 2.8g is analyzed for % of Fe. all Fe is converted to Fe2O3 for which m1g. what is % of Fe?

Actual Questiona sample of iron ore weighing 2.8 g is to be analyzed for the percentage of iron. all of the iron in the sample is converted into iron oxide (Fe2O3) which has a mass of 1.0 g. what is the percentage of iron in the ore?