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¡¡¡¡3¡¢to bid a project, the cost includes material cost and labor cost, ask the percentage of X's bid cost to Y's bid cost?
¡¡¡¡a.X's costs are 20% higher than labor costs and 10% higher than material costs.
¡¡¡¡b. Of total costs', Y'S 60% are labor costs.
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¡¡¡¡9¡¢A company ¡®s profit increased x percent in 1980 than 1975, and increased y percent in 1985 than in 1980, what percent increased in 1985 than 1975.
¡¡¡¡1) x+y=4
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¡¡¡¡10¡¢The area of a round pool is 63, and the area of a passage around the pool is 18, ask the width of the passage is most approximate to which of the following answer
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¡¡¡¡a.X's costs are 20% higher than labor costs and 10% higher than material costs.
¡¡¡¡b. Of total costs', Y'S 60% are labor costs.
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