Quadri-, quadru-, quadr-is a Latin prefix related to the verb quadrare âto make squareâ, quadratus âsquareâ etc. Quad is simply an English shortening of quadrangle, quadruplet etc. So quadri-and quad are actually the same word.
The Washington state sales tax rate is 6.5% , and the average WA sales tax after local surtaxes is 8.89% 1  . Groceries and prescription drugs are exempt from the Washington sales tax. 2  Counties and cities can charge an additional local sales tax of up to 3.1%, for a maximum possible combined sales tax of 9.6%.
The 9.20% sales tax rate in Everett consists of 6.50% Washington state sales tax and 2.70% Everett tax. There is no applicable county tax or special tax. You can print a 9.20% sales tax table here. For tax rates in other cities, see Washington sales taxes by city and county.