Question
PSLE
Mrs Neo had a bottle of vinegar. She used an equal amount of vinegar each day. At the end of the eighth day, she had 480 mℓ of vinegar left. At the end of the twelfth day, she had one-quarter of the bottle of vinegar left. How many litres of vinegar were there in the bottle at first?
2 m

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PSLE
Mrs Neo had a bottle of vinegar. She used an equal amount of vinegar each day. At the end of the eighth day, she had 480 mℓ of vinegar left. At the end of the twelfth day, she had one-quarter of the bottle of vinegar left. How many litres of vinegar were there in the bottle at first?