To get the percentage decrease cost of the pizza, we have the formula below:
[tex]r=\frac{\text{amount of decrease}}{\text{original price}}\times100[/tex]From $17, the price of the pizza became $14. This means $3 was deducted from the original price. This will be our amount of decrease. Together with the original price $17, let's plug them in to the formula.
[tex]r=\frac{3}{17}\times100=17.64706\approx17.65[/tex]Therefore, the percent decrease in the cost of the pizza is approximately 17.65%.
