If you gave the cashier $20 for six bottles of water and she gave you back eight dollars how much is one bottle of water

Answer 1

First determine how much you paid for six bottles of water. How much money did you spend? That is the amount paid minus the change you got back:

$20 − $8 = $12

Then divide the $12 you paid by the number of bottles to get the price per bottle:

12/6 = $2 per bottle