If the sales tax be reduced from (7 / 2 )% to (10 / 3) %

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If the sales tax be reduced from (7 / 2 )% to (10 / 3) % , what difference does it make to a person who purchases an article whose marked price is $ 8,400?

Given that , marked price = $ 8,400

Difference in percentage of sales tax =		7	-	10	=	21 - 20	=	1	%
		2		3		6		6

∴ Required difference =	1	% of 8400
	6

Required difference =		1	×	1	× 8400 = $ 14
		6		100