Question
PSLE
Luke kept pens in boxes M and N. Box M contained four times as many pens as box N. In box M, 13 of the pens were green pens. In box N, 12 of the pens were green pens. What fraction of Luke's pens were green pens?
2 m

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PSLE
Luke kept pens in boxes M and N. Box M contained four times as many pens as box N. In box M, 13 of the pens were green pens. In box N, 12 of the pens were green pens. What fraction of Luke's pens were green pens?