code: private int getPercentageY(double value) {
  		value = 1.0 - value;
  		double d = top + (((bottom - top) * value) / (maxPercentage - minPercentage));
  		return (int) d;
  	}
docs: Get the Y coordinate based on percent value 0.0-1.0
  
  @param value
  @return