Question
In a box, 45% of the staplers are silver staplers and the rest are black and grey staplers. The number of grey staplers is four times the number of black staplers. What percentage of the staplers in the box are black staplers?
2 m

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In a box, 45% of the staplers are silver staplers and the rest are black and grey staplers. The number of grey staplers is four times the number of black staplers. What percentage of the staplers in the box are black staplers?