Final answer:
To estimate the amount of juice left in George's bottle, subtract the amount he drank from the total amount. In this case, it is 71.43ml.
Step-by-step explanation:
To estimate how much juice was left in George's bottle, we need to subtract the amount he drank from the total amount of juice in the bottle. George drank 5/7 of his 250ml bottle, which is equal to 5/7 x 250 = 178.57ml (rounded to two decimal places).
To find the amount of juice left, we subtract the amount George drank from the total amount: 250ml - 178.57ml = 71.43ml (rounded to two decimal places).
Therefore, an estimated 71.43ml of juice was left in George's bottle