Question
PSLE
Ethan kept his black and red buttons in two boxes. The ratio of the number of black to red buttons in the first box was 1 : 2 and it was 3 : 4 in the second box. The two boxes contained the same number of buttons. What fraction of Ethan's buttons were black buttons?
2 m

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PSLE
Ethan kept his black and red buttons in two boxes. The ratio of the number of black to red buttons in the first box was 1 : 2 and it was 3 : 4 in the second box. The two boxes contained the same number of buttons. What fraction of Ethan's buttons were black buttons?