GST rates are the same since 2008 at 5%.
The QST rate is the same since 2013 at 9.975%. However, the “final rate” remains the same since 2012 as the method of calculating QST has changed on January 1st 2013.
Here is how the total is calculated before sales tax:
Amount with sales tax / (1+(GST and QST rate combined/100)) or 1.14975 = Amount without sales tax
Amount without sales tax * GST rate = GST amount
Amount without sales tax * QST rate = QST amount