To find the % sales tax, you simply need to find that percentage of the price. 5% of $98.75 is $4.94 98.75x0.05=4.94 8% of $98.75 is $7.90 98.75x0.08=7.90 6.5% of $98.75 is $6.42 98.75x0.065=6.42 Therefore, of the sale amount $98.75, 5% sales tax is $4.94 8% sales tax is $7.90 6.5% sales tax is $6.42 If you want to find the total price, add the sales tax to the sale price.