Question

A book sold 37,900 copies in its first month of release. Suppose this represents 9.1% of the number of copies sold to date. How many copies have been sold to date? Round your answer to the nearest whole number.

Answer 1

We know that 9.1% of the total copies sold are 37,900.

If we call N to the total amount of copies sold and see that 9,1% correspond to a proportion of 9.1/100=0.091, we can calculate N as:

`\begin{gathered} 0.091\cdot N=37,900 \\ N=(37,900)/(0.091) \\ N\approx416,484 \end{gathered}`

Answer: the total number of copies sold is approximately 416,484.