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Bunuel
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Hey, if number of current female smokers reduced from 35% to 15%, why couldn't the answer be, "Current female smokers"; "Decreased by approximately 20%".
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Hey, if number of current female smokers reduced from 35% to 15%, why couldn't the answer be, "Current female smokers"; "Decreased by approximately 20%".

Your mistake is in how you're interpreting the percentage decrease. The number of current female smokers dropped from 35% to 15%, which means the decrease is 20 percentage points, not a 20% decrease.

To find the percentage decrease correctly:

(35 - 15)/35 * 100 = about 57% decrease, not 20%.

Since "Decreased by approximately 20%" is not an accurate description, that option cannot be the correct answer.
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Hi Bunuel, how are you considering the part - females who never smoke? it is not explicitly given, that's why you are considering it as 100%? Please clear this part for me!
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Hi Bunuel, how are you considering the part - females who never smoke? it is not explicitly given, that's why you are considering it as 100%? Please clear this part for me!
We are given two groups: the percentage of current female smokers and the percentage of former female smokers. What group completes this to 100%? What other group could there be?

It's the group of people who never smoked, and its percentage would simply be:

Never smoked = 100% - (current smokers + former smokers).


Since the graph only provides data for current and former smokers, the remaining percentage must represent those who never smoked.
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