Which expression represents the result of increasing a positive quantity w by 43 % ?

Question

Accepted Answer

Choice A is correct. The result of increasing a positive quantity w by x % can be represented by the expression 1 + x 100 w . Therefore, the result of increasing a positive quantity w by 43 % can be found by substituting 43 for x in the expression 1 + x 100 w , which gives 1 + 43 100 w , or 1.43 w . Thus, the expression 1.43 w represents the result of increasing a positive quantity w by 43 % . Choice B is incorrect. This is the result of decreasing a positive quantity w by 43 % . Choice C is incorrect. This is the result of increasing a positive quantity w by 4,200 % . Choice D is incorrect. This is the result of decreasing a positive quantity w by 57 % .

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