Question
Natalie had 1600 mℓ more tea than Yoko. After Natalie gave Yoko 420 mℓ of tea, the ratio of Natalie's tea to Yoko's tea became 5 : 3. How much tea did Natalie have at first? Give your answer in millilitres.
4 m

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Natalie had 1600 mℓ more tea than Yoko. After Natalie gave Yoko 420 mℓ of tea, the ratio of Natalie's tea to Yoko's tea became 5 : 3. How much tea did Natalie have at first? Give your answer in millilitres.