java标准百分比

  

import java.text.NumberFormat;

public class 百分比 {
public static void main(String[] args) {
int completed=30;
int total=541;
double percentage=((double) completed/(double) total)*100;
NumberFormat numberFormat=NumberFormat.getPercentInstance();
numberFormat.setMinimumFractionDigits(2);
String result=numberFormat.format(((double)completed)/((double)total));
System.out.println(result);
}
}

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