HELP I WILL GIVE BRAINLEIST OR WHATEVER 50 POINTS

answer:
a. scarf costs today = $6
b. scarf costs 3 days from now = $3
step-by-step explanation:
a. original price of scarf: $12
12 X 1/2 = 6
12 - 6 = 6
— scarf costs today = $6
b. 12 X 3/4 = 9
12 - 9 = 3
— scarf costs 3 days from now = $3