A hardware store sells 45 boxes of nails for $67.50. Assuming that each box is the same price, what is the price per box?
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you can check in your calculator.
anyhow, to get the "recurring decimal to fraction", you start by setting to some variable, "x" in this case, then move the repeating part to the left of the point by multiplying it by some power of 10, and then do the equating.