The price of an item has been lowered two times, each time by \(p\)%.
Find \(p\), if the final price of the item is \(19\)% lower than the starting price.
At the end, the price is 81%. That means each time the price becomes 90% of what it was previously. There was a 10% decrease each time.
x * r *r = .81x
r = .9
p = 1 - r p = 10 %