would it be 12000 - 700 = 11300 ml
How many ml does 85 cups hold if 1 cup holds 140 ml? Then subtract this number from 12 000 ml to gey your answer.
I have done 85 x 140 ml = 11900ml and 12000 - 11900 = 100ml.
The full quesiton is
A coffee urn holds 12 litres when full. Harry fills coffee cups from the urn until the coffee runs out.
(a) How many 140ml cups of coffee can be filled from the urn?
(b) At the end there is not enough coffee left to fill a cup. Harry decides to drink it himself. How much coffee is there left for him?
I have gotten a correct by doing 140/12000 = 85.7