Question
PSLE
Owen kept files in boxes Y and Z. Box Y contained four times as many files as box Z. In box Y, 15 of the files were green files. In box Z, 12 of the files were green files. What fraction of Owen's files were green files?
2 m

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PSLE
Owen kept files in boxes Y and Z. Box Y contained four times as many files as box Z. In box Y, 15 of the files were green files. In box Z, 12 of the files were green files. What fraction of Owen's files were green files?