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Question

A book sold 38,900 copies in its first month of release. Suppose this represents 9.9% 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

Hi Ze,

Let's use the variable, x , to represent the number of copies sold to date. Also, 9.9% can be written in decimal form as 0.099.

Using the following equation, we can determine the number of copies sold to date:

0.099x = 38,900

Divide both sides of the equation by 0.099:

0.099x/0.099 = 38900/0.099

x = 392,929 copies

Let me know if you need more help or any lessons. Would be happy to help.

Irene Rooney