A cookbook originally cost 12.00 yesterday, Marta bought it at 1/3 off. How much was deducted from the original price?

$8

Step-by-step explanation:

The price would be $4 so

12 - 4

$8

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9