Question

a book sold 37800 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?

Answer 1

hello

to solve this question, we simply need to subtract 8.9% from 100 and then find the value

or we can still use this value but instead find the ratio between the first month and the total sales

we find 8.9 % from the total sale which is 37800 copies

`\begin{gathered} (8.9)/(100)=(37800)/(x) \\ \text{cross multiply both sides and solve for x} \\ 8.9* x=100*37800 \\ 8.9x=3780000 \\ \text{divide both sides by the coeffiecient of x which is 8.9} \\ (8.9x)/(8.9)=(3780000)/(8.9) \\ x=424,719.101\approx424,719 \end{gathered}`

from the calculations above the total sales is equal to 424,719 copies