Bennett tried to solve exercise 1 a few different ways. which of his methods are correct? of the other methods, which makes the most sense to you? explain a. 5% sales tax means that for every dollar you spend, you need to pay a nickel in tax. if you buy a nickel tax. if you buy something for $21, you need to pay 21 nickels in tax. b. you can set up a promotion and solve for the missing value. $.05 = x < -- (these are fractions) __ $1.00 $21.00 c. if you know that 10% of $21 is $2.10, so 5% should be half of $2.10 d. 5% is equal to 1/20. to find the amount of tax on $21, find $21 ÷ 20 e. 1% of $21.00 is $0.21 so 5% of $21.00 is 5 x $ 0.2