Help with math please

Question

A book sold 31,500 copies in its first month of release. Suppose this represents 8.9% 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

If the total number of books is x

then x*8.9% = 31500. (cancel 8.9% )

x = 353933