Eddie mixed together $$15$$ pounds of dogfood $$A$$ that contained $$40 \%$$ rice and $$60$$ pounds of dogfood $$B$$. Find the percent of rice in dogfood $$B$$ if the mixture contains $$28 \%$$ rice. 
Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Finding the Rate