Multiple choice

The length of a rectangle is increased by 60%. By what % would the width have to be decreased to maintain the same area?

  1. 30%

  2. 60%

  3. 75%

  4. 37.5%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let length L and width W. New length = 1.6L. To keep area (L*W) constant, 1.6L * new_W = L*W. New_W = W/1.6 = 0.625W. The decrease is 1 - 0.625 = 0.375, which is 37.5%.

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