Question

In January, a bookstore sells 450 books, but in February, it sells only 300 books. what is the percent change from Jan to Feb.

Answer 1

$\Large\bf{\frac{New~value~-~Old~value}{Old~value}\times 100$%


$\Large\bf{\frac{300~-~450}{450}\times 100$%

$\Large\bf{\frac{-150}{450}\times 100$%

$\Large\bf{-33\frac{1}{3}}$%

So that means there was was 33 1/3% decrease in the number of books they sold from January to February.