The price of a dress was reduce from $20 to $12. By what percentage was the price of the dress reduced?

40%

Step-by-step explanation:

12$ out of the original 20$ = 12/20

12/20 = .6 (60%)

1=100%

if 12/20 = 60% then 100% - 60% = 40%

step-by-step explanation:

jbjuiuhuhuuy

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: