exam Maths Puzzle Numerical Ability

Quadruple one fifth of some fration that is greater than zero.
Then, multiply the result by the fraction again to get the product 1/5.
WHAT IS THE FRACTION?

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exam Other Question
There are 8 ounces in a ½ pound. How many ounces are in 7 3/4 lbs? Please help.
Factor the expression.
a^2(b -c) - 16b^2(b-c)