Answer:
Her percentage profit is 3%
Step-by-step explanation:
In the case of 8% profit,
If the purchasing price is $100, the selling price is = $100 + $8 = $108
Now,
If the selling price is $108, the purchasing price is $100
If the selling price is $1, the purchasing price is $100/$108
If the selling price is $540, the purchasing price is ($100*$540)/$108 = $500
Again,
If she reduces the selling price to $515, the profit will be ($515-$500) =$15
Now,
If the purchasing price is $500, the profit is = $15
If the purchasing price is $1, the profit is = $15/$500
If the purchasing price is $100, the profit is = ($15*$100)/$500 = 3%
