Hello i have created a custom module , and i dsplay the fields in a qweb report which i also created , the problem is when i look at the module i a normal list view data shows correctly like :

deposit :45.00

How ever if print the custom report : the data shown is 45.0

here is an example of my modules code :

from openerp.osv import fields,osv
from openerp import tools
class cm_rental_contracts(osv.osv):
    _name = "cm.rental.contracts"
    _description = "Camden Market Rental Contracts"
    _auto = False
    _columns = {
                 'name':fields.char('Name'),  
                 'address':fields.char('Address'),
                 'address2':fields.char('Address2'),
                 'state':fields.char('Town'),
                 'city':fields.char('City'),
                 'post_code':fields.char('Post Code'),
                 'country':fields.char('Country'),
                 'sale_items':fields.char('Items of Sale'),
                 'rent':fields.char('Rent'),
                 'outgoing':fields.char('Outgoing'),
                 'service_charge':fields.char('Service Charge'),
                 'contract_category':fields.char('Contracts Category'),
                 'deposit':fields.float('Deposit'),
                 'start_date':fields.date('Start Date'),
                 'units':fields.char('units'),
                 'invoicing_company':fields.char('Invoicing Company'),
                 'invoicing_company_number':fields.char('Invoicing Company Number')

here is an example of a line of in my qweb report in which calls data from my module and displays it :

 <font t-field ="o.rent" face="Arial, serif">:</font>

Is there any way to fix this ?