exam Maths Puzzle Numerical Ability

Please help me solve this complex fraction.

(2/x)
_____________
1 - (1 / y)

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exam Other Question

subtract 3x/16 - x/16 is this x/8? If grade A coffee costs .95 cents a pound and grade b coffee costs .75 cents a pound, how many pounds of each grade is needed if the total cost is $50.50, and the amount of grade b that is needed is twice the amount needed for grad A plus 5 pounds?