Respuesta :

smmwaite

Answer:

12.5%


Step-by-step explanation:

The cost of a book last month = $16

The cos of the book this month = $18

Increase = $18 - $16

              = $2

Percentage increase = increase/original cost × 100%

                                   = 2/16 × 100%

                                   = 12.5%