Mr. brown brought some books at a book sale, including 4 paperback books.20% of all the books he bought were paperback. how many books did he buy in all

Answers

987 - 123 = 864 is the answer

answer:

-y +-i

step-by-step explanation:

Mr. Brown brought a total of 20 books.

Step-by-step explanation:

Finding the Total Value given the Percentage of a Partial Value

From the equation

\frac{percentage}{100}  =  \frac{partial \: value}{total \: value}

then,

total \: value \:  =  (\frac{partial \: value}{percentage})(100)

therefore,

total \: value \:  =  (\frac{4}{20} )(100) \\  total \: value \:  = 20

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