Rena bought some fruit at a grocery store. $$\frac{2}{3}$$ of them were apples, $$\frac{1}{9}$$ of them were bananas and the rest were lemons. She bought $$12$$ more apples than lemons. How many lemons did Rena buy? 
Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Converting Between Different Units of Measure 1