A number is decreased by 30%, then increased by 30%, then further decreased by 10%. What is the net increase/decrease percent in the number (correct to the nearest integer)?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 18% decrease
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Understanding |
Application |
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Let the number = 100 |
New number = 100 × 0.7 × 1.3 × 0.9 = 70 × 1.17 = 81.9 Net decrease = [(100 – 81.9)/100] × 100 = 1810/100 = 18.1 ≈ 18% |