import java.text.DecimalFormat;

public class PercentCalcTest {
    public static final String PERCENT_PATTERN = ".##";

    /**
     * 백분율로 변환
     * @param total : Max Size
     * @param range : idle or used size
     * @param pattern
     * @return
     */
    public static String parsePercent(double total, double range, String pattern) {
        DecimalFormat df = new DecimalFormat(pattern);
        return df.format((range * 100.0) / total);
    }

    public static void main(String[] args) {
        System.out.println("백분율 : " +  parsePercent(100000, 43500, PERCENT_PATTERN)+ "%");
    }
}