Acostumer pays $18 for a dvd that originally cost $20. what is the percent decrease in the cost of the dvd? a.2% b.10% c.11% d.18% barbra chose c as the correct answer. how did she get that answer?

11%

Step-by-step explanation:

Percentage decrease is gotten with thus formula.

Actual price - Old Price= New price

New price/Old Price * 100/1

From the above question.. $18= Old price , $20= New price

So 20-18 = 2(New Price)

2/18 *100 = 0.11 * 100 = 11%

she did 20-18 (og - final amount) then divided by 18, the multiplied by 100

Step-by-step explanation:

basically you just have 2/18 x 100

i have no idea if shes right because i think its B but for the question your asking it would be what i said up there :)

hope this helps!!

how i learned it was og price - final price divided by og price times 100 but idkk