If 125% of x is 80 and x is n % of 400, what is the value of n?

Correct answer: C. 16

  • A. 12
  • B. 14
  • C. 16
  • D. 18

Explanation

To solve this problem, we start by calculating the value of x from the equation 125% of x = 80. Converting 125% to a decimal gives 1.25, so the equation becomes 1.25x = 80. Solving for x, we divide both sides by 1.25 to get x = 64.Next, we use the information that x is n% of 400. This can be expressed as x = (n/100) * 400. Substituting the value of x (64) into the equation, we have 64 = (n/100) * 400. Solving for n, we divide both sides by 400 to get 0.16 = n/100. Finally, multiplying both sides by 100 gives n = 16.Therefore, the correct answer is Option C (16), as this is the percentage that x (64) represents of 400. The other options are incorrect because they result from miscalculations of the percentage relationship.

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Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.

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