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In a basket, there are $60$ bananas. $20$\% of them are rotten. How many bananas are in good condition? 
Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Percentages Word Problems
$1-20$\%=$80$\%,  $60 \times 80$\%=$48$.  $48$ bananas are in good condition. 