An electronic device that previously sold for $21 has been reduced to 17.43. the price reduction, rounded to the nearest whole percent is

%change=100(final-initial)/initial

%change=100(17.43-21)/21

%change= -17%

Percent decrease = (new number - original number) / original number...* 100
                            = (21 - 17.43) / 21* 100
                            = 3.57 / 21* 100
                            = 0.17 * 100
                            = 17%the price reduction was 17%