a book sold for 42,900 copies in its 1st month of release. suppose this represents 7.7% of the number of copies sold to date. how many copies will have been sold to date?

Question

a book sold for 42,900 copies in its 1st month of release. suppose this represents 7.7% of the number of copies sold to date. how many copies will have been sold to date?

Answer 1

Hi Joan,

You can solve this problem in more than one way.

One method would be to use an equation and solve for the number of copies sold to date.

Let x represent the number of copies sold to date. Then we can write and solve the following equation to find this number. (Recall that 7.7% is equal to 0.077):

0.077 x = 42900

Divide both sides of the equation by 0.077:

0.077 x = 42900

0.077 0.077

x = 55714 copies sold to date