Question
Yoko had 1350 mℓ more coffee than Fiona. After Yoko gave Fiona 480 mℓ of coffee, the ratio of Yoko's coffee to Fiona's coffee became 7 : 4. How much coffee did Yoko have at first? Give your answer in millilitres.
4 m

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Yoko had 1350 mℓ more coffee than Fiona. After Yoko gave Fiona 480 mℓ of coffee, the ratio of Yoko's coffee to Fiona's coffee became 7 : 4. How much coffee did Yoko have at first? Give your answer in millilitres.