Subject
Quantitative Aptitude
Topic
Percentage
A number is increased by 40% then again by 40%. Then it is decreased by 40%. By what percent the original number has changed?
A number is increased by 40% then again by 40%. Then it is decreased by 40%. By what percent the original number has changed?
ক)
40%খ)
56%গ)
17.6%ঘ)
16%ঙ)
None of theseExplanation
Let original number be 100x. According to question, the number is first increased by 40% ∴ New number = 100x + (40% of 100x) = 100x + 40x = 140x It is again increased by 40%. ∴ New number = 140x + (40% of 140x) = 140x + 56x = 196x Now, this number is decreased by 40%. ∴ New number = 196x – (40% of 196x) = 117.6x ∴ Percentage change in original numberRelated questions
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