A number is decreased by 30%, then increased by 30%, then further increased by 30%. What is the net increase/decrease percent in the number (correct to the nearest integer)?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e.18% increase
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Understanding |
Application |
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Suppose the number is 100 |
New number = 100 × 0.7 × 1.3 × 1.3 = 70 × 1.69 = 118.30 Hence, Percentage increase = [(118.3 – 100)/100] × 100 = 18.3% ≈ 18% (Approx.) |