+0  
 
0
49
2
avatar

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.

 Jan 17, 2021
 #1
avatar+196 
+1

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.

:D

 Jan 17, 2021
 #2
avatar
0

x * r      *r    = .81x

r2 =.81

r = .9

 

p = 1 - r        p = 10 %

 Jan 17, 2021

68 Online Users

avatar
avatar
avatar
avatar
avatar
avatar
avatar
avatar