Problem Solving (PS) | Last Sunday a certain store sold copies of Newspaper A for

You can use smart numbers here.

Because P is a percentage it is best to pick 100 for the total number of hypothetical newspaper sales. This allows us to transform the percentages into real numbers.

Let's make p =20 for ease. if p =20 then 1-p =80

Now let's apply the prices for newspapers A and B:
$1*20 + $1.25*80 = $20 + $100 = $120 this is the total revenue

p = Revenue A/ Total Revenue*100 = $20/$120*100 = 100/6

Looking at the answer choices we want a resulting denominator that is divisible
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