Java Programming

I've a question on rounding doubles on 0.05

As far as i know there is no class method that is able to do this. To achieve this rounding i have the following code:

Example:

164.67 -> 164.70

173.33 -> 173.35

0.02 -> 0.05

 double calculatedQuantity = 0.0;

  // Formula to calculate the average working hours in a month
  int totalWeeksInYear = 52;
  int totalMonthsInYear = 12;

  calculatedQuantity = (quantity * totalWeeksInYear) / totalMonthsInYear;
// Round the 2 decimals
  calculatedQuantity = calculatedQuantity * 100;
  calculatedQuantity = Math.round(calculatedQuantity);

  //The rounding has to be on 0.05 in the benefit of the employee. Use modulus to get a 0 or 5
  while(calculatedQuantity%5!=0){
  calculatedQuantity = calculatedQuantity + 1;
  }


  calculatedQuantity = calculatedQuantity/100;

  calculatedQuantity = calculatedQuantity/100;

This works but i don't have the feeling this is efficient.

Any suggestions would be very welcome.

Regards,

Hans